Complete List of Pore Clogging Ingredients
If you struggle with acne, blackheads, or textured skin, the culprit might be hiding in your daily skincare routine. Many popular moisturizers, serums, and makeup products contain pore clogging ingredients that trap dead skin cells and sebum, leading to breakouts.
To help you achieve clear skin, we have compiled this comprehensive comedogenic ingredients list. Use this guide to cross-reference your product labels and avoid ingredients that clog pores.
Use our Interactive Skincare Ingredient Checker to instantly scan your product’s formula for any comedogenic triggers.
Understanding the Comedogenic Scale
Before diving into the list, it’s important to it is vital to understand What Is Comedogenic and how these ingredients are rated. The comedogenic scale measures how likely an ingredient is to cause comedones (clogged pores).
- Rating 0: Non-comedogenic; completely safe for acne-prone skin.
- Rating 1–2: Low risk; unlikely to cause issues for most individuals.
- Rating 3–5: High risk; these are the primary ingredients that clog pores and should be avoided in leave-on products.
If you are unsure about a specific blend, our pore clogging checker can analyze the entire formula at once for a more accurate risk assessment.
The A-Z Pore-Clogging Ingredients Table
Below is our comprehensive, alphabetical database of cosmetic ingredients, their comedogenic ratings, and their composition type.
Tip: Use the search bar to quickly search this list for specific ingredients.
| Cosmetic Ingredient | Rating | Composition | Description and Usage |
|---|---|---|---|
| 1-Acetoxyhexadecane | 3 | Ester | A synthetic emollient used to soften the skin and improve product texture. |
| 1-Hexadecanol Acetate | 3 | Ester | A fatty acid ester that acts as a skin-conditioning agent and thickener. |
| A & D Additive | 2 | Vitamins & Herbs | A vitamin blend added to products for skin healing and nourishment. |
| Acai Berry Oil | 4-5 | Oils (High in oleic acid) | An antioxidant-rich botanical oil used for heavy moisturization. |
| Acetol | 3-5 | Alcohols | An organic compound used as a solvent and fragrance ingredient. |
| Acetulan | 4-5 | Lanolins | A commercial lanolin derivative used to give products a smooth, velvety feel. |
| Acetylated Lanolin | 4 | Lanolin Derivative / Lanolins | Chemically modified sheep sebum used as an intensive, water-resistant moisturizer. |
| Acetylated Lanolin Alcohol | 4 | Lanolin Derivative / Lanolins | A fatty alcohol derived from lanolin used to soften skin and stabilize emulsions. |
| Active Soil Complex | 4 | Minerals | A proprietary mineral blend used for texture and purported anti-aging benefits. |
| Agar | 3 | Polysaccharide / Thickener | A jelly-like substance from red algae used as a natural binding and thickening agent. |
| Ahnfeltia Concinna | 3 - 4 | Seaweed / Marine Algae | A red marine algae extract used to hydrate and form a protective film on the skin. |
| Alaria Esculenta | 3 - 4 | Seaweed / Marine Algae | A brown algae used for its amino acids and antioxidant properties. |
| Algae / Algae Extract | 3-5 | Seaweed / Marine Botanicals | Broad category of marine plants used for hydration; naturally high in pore-clogging iodine. |
| Algin / Alginate | 4 | Seaweed Derivative / Polysaccharide / Thickener | Derived from brown seaweed, used to thicken liquids and create gel-like textures. |
| Aloe Butter | 5 | Butters | Aloe extract blended with a heavy fat (like coconut oil) for deep moisturizing. |
| Almond Oil (Sweet) | 2 | Natural Oil | A mild, soothing plant oil used as an emollient and carrier oil. |
| Amaranth Oil | 3 | Oils | A botanical oil high in squalene, used for hydration and barrier repair. |
| Andiroba Seed Oil | 2 | Natural Oil / Oils (High in oleic acid) | An Amazonian plant oil used to reduce inflammation and moisturize. |
| Anhydrous Lanolin | 5 | Lanolins | Pure, water-free sheep sebum; an extremely heavy occlusive moisturizer. |
| Apricot Kernel Oil (Prunus Armeniaca) | 2 - 5 | Natural Oil / Oils (High in oleic acid) | A lightweight but oleic-heavy oil used to soften skin and seal in moisture. |
| Arachidic Acid | 2 | Fatty Acid(s) | A saturated fatty acid found in peanut oil, used as an emulsifier and thickener. |
| Argan Oil (Argania Spinosa) | 3-5 | Oils (High in oleic & linoleic acid) | A popular plant oil used to condition skin and hair; rating varies by skin type. |
| Ascophyllum Nodosum | 4 | Marine Extract / Algae | A brown kelp extract used for its soothing properties and mineral content. |
| Ascorbyl Palmitate | 2-5 | Vitamin C Derivative / Fatty Acids & Derivatives | A fat-soluble form of Vitamin C used as an antioxidant and preservative. |
| Astrocaryum Murumuru Seed Butter | 3 - 5 | Natural Plant Butter / Fatty Acids | A rich Amazonian butter used to lock in moisture and protect the skin barrier. |
| Avocado Butter | 3 - 5 | Natural Plant Butter / Butters | Avocado oil hydrogenated into a solid butter for intensive hydration. |
| Avocado Oil (Persea Gratissima) | 3-5 | Natural Oil / Oils (High in oleic acid) | A highly nourishing, heavy oil used for dry and mature skin types. |
| Babassu Butter | 5 | Butters | A semi-solid plant lipid similar to coconut oil, used as a heavy moisturizer. |
| Babassu Oil | 2 | Natural Oil / Oils (High in lauric acid) | A clear plant oil used as a lighter, cooling alternative to coconut oil. |
| Baobab Oil | 4-5 | Oils (High in oleic acid) | An African tree oil rich in vitamins, used to deeply moisturize dry skin. |
| Beef Tallow | 3 | Animal Fat | Rendered beef fat used as an occlusive skin conditioner and in soap making. |
| Beeswax (Cera Alba) | 2 | Animal Wax / Waxes | Natural wax produced by bees, used to thicken creams and create protective barriers. |
| Behenic Acid | 2 | Fatty Acids | A saturated fatty acid used to provide a soothing feel and opacify cosmetics. |
| Benzaldehyde | 2 | Fragrance / Solvent | An aromatic compound providing an almond-like scent. |
| Benzoic Acid | 2 | Preservative | An organic acid used to prevent bacterial and fungal growth in products. |
| Bismuth / Bismuth Oxychloride | 3 | Mineral Colorant / Minerals | A synthetic mineral powder used to give makeup a pearlescent, glowing finish. |
| Black Cumin Seed Oil | 4 | Oils (High in linoleic acid) | An antioxidant-rich oil used for its purported healing and anti-inflammatory benefits. |
| Black Kelp | 3 - 5 | Seaweed / Marine Algae | A marine plant used to draw toxins and hydrate, but prone to clogging pores. |
| Bladderwrack | 3 - 5 | Seaweed / Marine Algae | A type of seaweed used to soothe skin, high in minerals and iodine. |
| Blue / Blue Green Algae | 3 - 5 | Botanical Extract / Seaweed / Marine Algae | Microalgae used for anti-aging and hydration, often triggering acne due to iodine. |
| Borage Oil | 2 - 3 | Natural Oil / Oils (High in linoleic acid) | A plant oil high in gamma-linolenic acid (GLA), used to calm irritated skin. |
| Brazil Nut Oil | 2 - 3 | Natural Oil / Oils (High in oleic acid) | A nutrient-dense oil used as a rich emollient for dry skin and hair. |
| Broccoli Butter | 5 | Butters | A blend of broccoli seed oil and heavy lipids used for intense barrier protection. |
| Brown Algae | 3 | Seaweed / Marine Algae | General classification of seaweed used as water-binding agents and thickeners. |
| Buriti Oil | 2 | Oils (High in oleic acid) | An Amazonian oil rich in beta-carotene, used to soothe and protect the skin. |
| Butyl Stearate | 3-4 | Ester / Fatty Acids & Derivatives | A synthetic compound used to decrease the thickness of liquids and condition skin. |
| Butyrospermum Parkii (Shea Butter) | 0-5 | Natural Plant Butter (High in oleic/stearic acid) | A widely used, rich African plant butter that moisturizes and protects the skin barrier. |
| Cacao Seed Butter | 4 | Natural Plant Butter | Extracted from cocoa beans, used to provide a rich, creamy texture and deep hydration. |
| Cajeput Oil | 2 | Essential Oil | An essential oil from the melaleuca family used for its natural scent and antiseptic traits. |
| Calendula Extract | 1 | Botanical Extract | Marigold flower extract used to soothe, calm, and reduce skin inflammation. |
| Camellia Oil | 4-5 | Oils (High in oleic acid) | A lightweight but highly emollient green tea seed oil used for deep moisturizing. |
| Camphor / Camphor Oil | 2 | Terpene / Fragrance / Oils | A strong-smelling compound used for its cooling sensation and aromatic properties. |
| Canola Oil | 3 - 4 | Natural Oil / Vegetable Oils | An inexpensive culinary oil sometimes used as a base emollient in cosmetics. |
| Capric Acid | 2 | Fatty Acid(s) & Derivatives | A fatty acid derived from coconut/palm oil, used to condition skin and add fragrance. |
| Carnauba Wax | 1 | Plant Wax | A hard wax from Brazilian palm leaves, used to firm up lipsticks and balms. |
| Carrageenan (Chondrus Crispus) / Carrageenan Moss | 3 - 5 | Polysaccharide / Thickener / Seaweed / Marine Algae | A seaweed derivative used to bind water and create smooth, gel-like textures. |
| Carrot Butter | 5 | Butters | A heavy lipid blend infused with carrot extract to deliver beta-carotene. |
| Carrot Seed Oil | 3 - 4 | Carrier / Essential Oil / Oils (High in oleic acid) | An essential/carrier oil rich in antioxidants used for anti-aging and skin rejuvenation. |
| Castor Oil (Ricinus Communis) | 1 - 2 | Natural Oil / Oils (High in ricinoleic acid) | A thick, viscous oil used to lock in moisture and often used in lip glosses and soaps. |
| Caulerpa Lentillifera Extract | 4 | Marine Extract / Algae | "Sea grape" extract used for its high water-retention and mineral properties. |
| Ceteareth-20 | 2 - 4 | Emulsifier / Surfactant / Alcohols & Derivatives | A synthetic compound that helps mix water and oil together; highly comedogenic if mixed with Cetearyl Alcohol. |
| Cetearyl Alcohol | 2 | Fatty Alcohol / Alcohols & Derivatives | A mixture of fatty alcohols used to soften skin and thicken creams (not a drying alcohol). |
| Cetearyl Alcohol + Ceteareth 20 | 4 | Emulsifier Blend | A common emulsifying wax mixture that is highly prone to clogging pores when combined. |
| Cetyl Acetate | 4 | Ester / Fatty Acids & Derivatives | A skin-conditioning ester that provides a velvety, water-repellent film on the skin. |
| Cetyl Alcohol | 2 | Fatty Alcohol / Alcohols & Derivatives | A common fatty alcohol used as an emollient, emulsifier, and thickening agent. |
| Chaetomorpha Linum | 4 | Marine Extract / Algae | A green algae extract utilized for its skin-conditioning and antioxidant properties. |
| Chaulmoogra Oil | 2 | Natural Oil | A rare botanical oil historically used to treat skin conditions, acting as an antimicrobial. |
| Cherry Seed Oil | 2 | Natural Oil | A lightweight fruit oil rich in antioxidants and vitamins, used for hydration. |
| Chlorella / Chlorella Vulgaris Extract | 3 - 4 | Seaweed / Marine Algae | A green microalgae packed with peptides and amino acids, used for skin firming. |
| Cladosiphon Okamuranus Extract | 4 | Marine Extract / Algae | An Okinawa brown seaweed extract known for its moisture-retaining mucilage (fucoidan). |
| Coal Tar | 5 | Hydrocarbon / Miscellaneous | A thick, dark byproduct of coal used medicinally for psoriasis and dandruff. |
| Cocoa Butter (Theobroma Cacao) | 4 | Natural Plant Butter / Butters (High in oleic/stearic acid) | A heavy, solid plant fat used to provide deep moisture and structural rigidity to products. |
| Coconut Alkanes | 4 | Hydrocarbon / Emollient / Oils / Fatty Acids | A synthetic silicone alternative derived from coconut oil, used for a smooth, dry finish. |
| Coconut Butter | 4 | Natural Plant Butter / Butters (High in oleic/stearic acid) | Pureed coconut meat, richer than coconut oil, used for heavy duty moisturization. |
| Coconut Oil (Cocos Nucifera) | 4 - 5 | Natural Oil / Oils (High in lauric acid) | A highly popular, solid-at-room-temp plant oil used as a heavy occlusive moisturizer. |
| Coffee Butter | 5 | Butters | Coffee seed oil blended into a solid fat base, used for antioxidant delivery and moisturization. |
| Colloidal Sulfur | 3 | Mineral(s) / Vitamins & Herbs | A finely ground sulfur used to treat acne and rosacea, but can be comedogenic in some bases. |
| Corallina Officinalis / Corallina Officinalis Extract | 3 - 4 | Seaweed / Marine Algae | A red seaweed known for calcification, used to gently exfoliate and remineralize skin. |
| Corn Oil (Zea Mays) | 3 | Natural Oil / Vegetable Oils | An inexpensive, readily available vegetable oil used as a skin conditioning agent. |
| Cotton Seed Oil | 3 | Natural Oil / Oils (High in linoleic acid) | A plant oil used in cleansing oils and moisturizers to soften the skin. |
| Cranberry Butter | 5 | Butters | A blend of cranberry seed oil and heavy lipids used for barrier repair. |
| Cranberry Seed Oil | 2 | Natural Oil | An oil with a balanced ratio of Omega 3, 6, and 9, used for lightweight hydration. |
| D&C Red Pigments (#3, 17, 19, 21, 27, 30, 36, 40) | 2-3 | Synthetic Dye(s) / Pigments | Coal tar-derived synthetic colorants used extensively in blushes, lipsticks, and foundations. |
| Date Seed Oil | 3 | Oils (High in oleic acid) | An oil rich in phytosterols and ursolic acid, used for anti-aging and moisturizing. |
| Decyl Oleate | 3 | Ester / Emollient / Fatty Acids & Derivatives | A skin-conditioning ester used to make products spread easily and feel less greasy. |
| Di (2-ethylhexyl) Succinate | 2 - 3 | Ester / Fatty Acids & Derivatives | A synthetic solvent and emollient that provides a light, non-oily feel. |
| Dictyopteris Membranacea | 4 | Marine Extract / Algae | A brown algae extract often used for skin-brightening and plumping claims. |
| Dioctyl Malate | 3 | Ester / Fatty Acids & Derivatives | A synthetic ester that acts as an emollient and helps disperse pigments in makeup. |
| Dioctyl Succinate | 3 | Ester / Fatty Acids & Derivatives | An emollient used to improve the texture, spreadability, and slip of lotions. |
| Disodium Laureth Sulfosuccinate | 2 | Surfactant | A gentle, large-molecule cleansing agent used as an alternative to harsh sulfates. |
| Disodium Monooleamido PEG-2 / PEG-2 Sulfosuccinate | 4 | Surfactant(s) & Detergents | A mild foaming and cleansing agent used in shampoos and body washes. |
| Dodecanoic Acid (Lauric Acid) | 4 | Fatty Acid | The main fatty acid found in coconut oil, used as a cleanser and emulsifier base. |
| Dulse (Palmaria Palmata) | 3 - 4 | Seaweed / Marine Algae | A red marine algae used for its high concentration of vitamins and trace minerals. |
| Dunaliella Salina Extract | 4 | Marine Extract / Algae | A microalgae loaded with beta-carotene, used to protect against environmental stress. |
| Ecklonia (all species) / Ecklonia Cava Extract | 3 - 4 | Seaweed / Marine Algae | An edible brown seaweed used in cosmetics for its strong antioxidant (polyphenol) content. |
| Eicosanoic Acid | 2 | Fatty Acid(s) & Derivatives | A saturated fatty acid used to add opacity and thickness to cosmetic formulas. |
| Emu Oil | 3 | Oils (High in oleic acid) | Oil rendered from emu fat, highly penetrative and used to carry other ingredients deep into skin. |
| Emulsifying Wax NF | 2 | Emulsifier / Waxes | A standard chemical wax blend used to seamlessly bind water and oil together in creams. |
| Enteromorpha Compressa | 3 - 4 | Seaweed / Marine Algae | A green algae used to soothe the skin and reduce the appearance of wrinkles. |
| Ethoxylated Lanolin | 3 | Lanolin Derivative / Lanolins | Lanolin processed with ethylene oxide to make it water-soluble; used as an emulsifier. |
| Ethylhexyl Palmitate | 4 | Ester / Emollient / Fatty Acids & Derivatives | A palm-oil derivative used as a silicone alternative to give products a "dry slip" feel. |
| Ethylhexyl Pelargonate | 2 - 3 | Ester / Fatty Acids & Derivatives | A lightweight synthetic ester used to condition the skin and improve texture. |
| Ethylhexyl Stearate | 4 | Ester | An emollient used to prevent water loss and give products a rich, luxurious feel. |
| Evening Primrose Oil | 2 - 3 | Natural Oil / Oils (High in linoleic acid) | An oil heavily used to treat inflammatory skin conditions like eczema and hormonal acne. |
| Flaxseed Oil (Linseed Oil) | 4 | Natural Oil / Oils (High in alpha linolenic acid) | A plant oil packed with omega-3s, used to soothe skin, though prone to rapid oxidation. |
| Fucoxanthin | 4 | Marine Derivative | A brown pigment from algae utilized for its potent antioxidant and UV-protective traits. |
| Fucus Vesiculosus | 3 - 5 | Seaweed / Marine Algae | Also known as Bladderwrack; a brown algae used for hydration but notorious for clogging pores. |
| Gelidiella Acerosa Extract | 4 | Marine Extract / Algae | A red seaweed extract used to condition and remineralize the skin barrier. |
| Gelidium Cartilagineum | 3 | Seaweed / Marine Algae | A red marine algae utilized to improve skin elasticity and hydration. |
| Gigartina Stellata Extract | 4 | Marine Extract / Algae | A type of red algae used similarly to carrageenan for its moisture-binding capabilities. |
| Glyceryl Oleate | 5 | Alcohols & Derivatives | An ester of glycerin and oleic acid used to stabilize water-in-oil emulsions. |
| Glyceryl Stearate SE | 3 | Emulsifier / Alcohols & Derivatives | A self-emulsifying form of glyceryl stearate used to form stable lotions and creams. |
| Glyceryl-3-Diisostearate | 4 | Emulsifier / Alcohols & Derivatives | A heavy duty synthetic emulsifier often used in rich, water-resistant sunscreens and foundations. |
| Glycine Soja (Soybean) Oil | 3-5 | Natural Oil / Oils (High in linoleic acid) | An inexpensive plant oil widely used as a moisturizing base and carrier oil. |
| Grapeseed Butter | 5 | Butters | Hydrogenated grapeseed oil creating a creamy solid used for heavy moisturization. |
| Grapeseed Oil (Vitis Vinifera) | 1 - 4 | Natural Oil / Vegetable Oils (High in linoleic acid) | A lightweight, fast-absorbing oil popular for acne-prone skin (though ratings heavily vary). |
| Groundnut Oil | 5 | Oils | Another term for peanut oil; a heavy occlusive oil used to trap moisture. |
| Guava Seed Oil | 2 | Oils (High in linoleic acid) | A lightweight tropical fruit oil rich in vitamins A and C, used for brightening and hydration. |
| Haematococcus Pluvialis Extract | 4 | Marine Extract / Algae | A freshwater microalgae that produces astaxanthin, a highly potent antioxidant. |
| Haslea Ostrearia / Haslea Ostrearia Extract | 3 - 4 | Seaweed / Marine Algae | A blue microalgae extract known as "blue navicula," used for skin conditioning. |
| Hazelnut Seed Oil | 4-5 | Oils (High in oleic acid) | A highly penetrating nut oil with astringent properties, used to soften the skin. |
| Hemp Seed Oil | 0 | Natural Oil | A deeply nourishing, non-comedogenic plant oil excellent for balancing sebum production. |
| Hexadecanol Acetate | 3 | Ester | A synthetic skin-conditioning agent used to create a protective barrier on the skin. |
| Hexadecyl Alcohol | 5 | Alcohols & Derivatives | Also known as Cetyl Alcohol; a fatty alcohol used to thicken and stabilize products. |
| Hexylene Glycol | 2 | Solvent / Humectant | A solvent and viscosity-decreasing agent used to thin out heavy formulations. |
| Himanthalia Elongata / Himanthalia Elongata Extract | 3 - 4 | Seaweed / Marine Algae | Known as "sea spaghetti," an algae extract used to balance moisture and deliver vitamins. |
| Hizikia Fusiforme Extract | 4 | Marine Extract / Algae | A brown seaweed extract used in anti-aging products to inhibit collagen breakdown. |
| Hydrogenated Castor Oil | 2 | Hydrogenated Natural Oil / Oils | Castor oil turned into a hard wax, used to stiffen formulations like deodorants and lipsticks. |
| Hydrogenated Vegetable Oil | 3 | Hydrogenated Oil / Vegetable Oils | Vegetable oil made solid at room temperature; acts as a heavy, protective occlusive. |
| Hydrolyzed Rhodophyceae Extract | 3 - 4 | Seaweed / Marine Algae | Red algae broken down by water to improve its ability to penetrate and hydrate the skin. |
| Hypnea Musciformis / Hypnea Musciformis Extract | 3 - 4 | Seaweed / Marine Algae | A red algae extract used primarily as a skin-conditioning agent and antioxidant. |
| Illipe Butter | 4-5 | Butters (High in oleic acid) | A hard plant butter similar to cocoa butter, used to restore elasticity and moisture. |
| Irish Moss | 5 | Marine Extract / Algae | A species of red algae heavily relied upon to thicken natural cosmetic formulas. |
| Isocetyl Alcohol | 4 | Fatty Alcohol / Alcohols & Derivatives | A branched fatty alcohol used to provide a non-greasy, softening effect to the skin. |
| Isocetyl Stearate | 5 | Ester / Alcohols & Derivatives | A very heavy synthetic ester used to lubricate the skin surface and prevent moisture loss. |
| Isodecyl Oleate | 3 - 4 | Ester / Fatty Acids & Derivatives | A lightweight emollient used to give products a smooth, elegant, fast-absorbing feel. |
| Isopropyl Isostearate | 5 | Ester / Fatty Acids & Derivatives | A highly comedogenic emollient used to bind ingredients and soften skin texture. |
| Isopropyl Lanolate | 4 | Lanolin Derivative | A lanolin-derived ester that acts as an excellent lubricant but easily clogs pores. |
| Isopropyl Linoleate / Isopropyl Linolate | 4 - 5 | Ester / Fatty Acids & Derivatives | An emollient and skin conditioner used to impart a smooth, non-tacky finish. |
| Isopropyl Myristate | 5 | Ester / Emollient / Fatty Acids & Derivatives | A ubiquitous synthetic oil used to reduce the greasy feel of lotions; highly pore-clogging. |
| Isopropyl Neopentanoate | 4 | Ester | A skin-conditioning ester used for its low viscosity and excellent spreadability. |
| Isopropyl Palmitate | 4 | Ester / Emollient / Fatty Acids & Derivatives | A palm oil derivative used to thicken products and give them a silky feel. |
| Isostearic Acid | 4 - 5 | Fatty Acid(s) | A liquid fatty acid used as an emulsifier and binder in cosmetics and makeup. |
| Isostearyl Alcohol | 2 | Fatty Alcohol | A fatty alcohol used to soothe the skin and stabilize emulsions. |
| Isostearyl Isostearate | 4 | Ester / Fatty Acids & Derivatives | A skin-conditioning emollient that provides a long-lasting, glossy finish on the skin. |
| Isostearyl Neopentanoate | 3 | Ester / Fatty Acids & Derivatives | An ester used as a binder and skin-conditioning agent in color cosmetics and creams. |
| Jania Rubens Extract | 4 | Marine Extract / Algae | A red calcified seaweed used for its ultra-hydrating and anti-pollution properties. |
| Jojoba Butter | 5 | Butters | Jojoba oil blended with hydrogenated oils to form a solid, intensely moisturizing butter. |
| Jojoba Oil / Butter | 2 | Liquid Wax | Technically a liquid wax that closely mimics human sebum; highly stable and moisturizing. |
| Jojoba Wax | 2 | Waxes | The solid, hydrogenated form of jojoba used in lip balms and solid skincare products. |
| Kapok Oil | 2 - 5 | Natural Oil / Oils | Oil extracted from the seeds of the Kapok tree, used occasionally as a skin softener. |
| Kappaphycus Alvarezii Extract | 4 | Marine Extract / Algae | A red algae often used alongside Tara bush extract for its immediate lifting/firming effects. |
| Karanja Oil | 2 | Oils (High in oleic acid) | A cousin to Neem oil, used for its natural antiseptic and mild UV-absorbing properties. |
| Kelp (Macrocystis Pyrifera) | 3 - 5 | Seaweed / Marine Algae | Giant sea kelp used to deliver intense hydration and iodine, but frequently triggers acne. |
| Kukui Nut Butter | 5 | Butters | A heavy butter formulation utilizing Kukui nut oil for intense barrier healing. |
| Kukui Nut Oil | 2 - 3 | Natural Oil / Oils (High in linoleic acid) | A lightweight Hawaiian oil known for penetrating the skin easily without feeling greasy. |
| Laminaria (all species) / Laminaria Digitata / Laminaria Saccharina | 3 - 5 | Seaweed / Marine Algae | Brown seaweeds (kelp) heavily used in luxury skincare to detoxify and hydrate. |
| Laneth-10 | 2 - 4 | Lanolin Derivative / Lanolins | A polyethylene glycol derivative of lanolin alcohol used as an emulsifier and surfactant. |
| Lanolic Acid | 4 - 5 | Lanolin Derivative / Lanolins | A fatty acid extracted from lanolin, used to create rich, water-repellent protective creams. |
| Lanolin / Lanolin Oil / Lanolin Acid | 2 - 4 | Animal Sebum / Lanolins / Oils | A heavy, wax-like substance secreted by sheep; one of the most effective known occlusives. |
| Lanolin Alcohol | 2 - 4 | Lanolin Derivative / Lanolins | A fraction of lanolin used to improve the stability and thickness of emulsions. |
| Lanolin Wax | 3 | Animal Wax / Waxes | A purified, solid portion of lanolin used to stiffen cosmetics and provide barrier protection. |
| Laureth-4 | 5 | Surfactant / Emulsifier / Alcohols & Derivatives | A harsh synthetic emulsifier and surfactant highly known to cause acne breakouts. |
| Laureth-23 | 3 | Surfactant / Emulsifier / Alcohols & Derivatives | An emulsifier and cleansing agent generally used to blend oil and water components. |
| Lauric Acid | 4 | Fatty Acid(s) & Derivatives | A major component of coconut oil; acts as a cleanser but is highly comedogenic. |
| Lauryl Alcohol | 2 | Alcohols | A fatty alcohol used as a fragrance ingredient, emollient, and emulsion stabilizer. |
| Linseed Oil | 4 | Natural Oil | Also known as flaxseed oil; a heavy emollient prone to rapid oxidation on the skin. |
| Lithothamnium Calcareum | 4 | Marine Extract / Algae | A red algae consisting mostly of minerals (calcium/magnesium), used for gentle exfoliation. |
| Macadamia Nut Butter | 5 | Butters | Macadamia oil blended into a solid state, providing intense, heavy hydration. |
| Macadamia Nut Oil / Macadamia Oil | 2 - 5 | Natural Oil / Oils (High in oleic acid) | An oil rich in palmitoleic acid, excellent for mature/dry skin but can clog oily skin types. |
| Macrocystis Pyrifera Extract | 5 | Marine Extract / Algae | An extract of giant kelp used for its high iodine and mineral content; extremely pore-clogging. |
| Magnesium Myristate | 2 - 3 | Mineral / Fatty Acid Blend | A texturizer created by combining magnesium with myristic acid; used to improve makeup adhesion. |
| Mahua Seed Oil | 5 | Oils | A heavy Indian botanical fat used to produce soaps and ultra-rich skin salves. |
| Mango Seed Butter / Oil | 2 | Butters / Oils (High in oleic acid) | A deeply moisturizing plant lipid that melts upon contact with the skin; generally well-tolerated. |
| Marine Algae | 3 | Seaweed / Marine Algae | A catch-all term for seaweed extracts used to hydrate, plump, and mineralize the skin. |
| Marula Oil | 3 - 4 | Natural Oil / Oils (High in oleic acid) | An antioxidant-rich African oil that is deeply hydrating but often too heavy for acne-prone skin. |
| Mastocarpus Stellatus | 3 - 4 | Seaweed / Marine Algae | A red algae used to form a soothing, moisture-retaining film on the skin. |
| Mineral Oil | 1 - 3 | Hydrocarbon | A highly purified, inert petroleum derivative used as a completely non-irritating occlusive. |
| Mink Oil | 3 | Animal Oil / Oils (High in oleic acid) | Oil rendered from mink fat, closely resembling human sebum, used to soften skin and hair. |
| Moringa Oil | 3 - 4 | Natural Oil / Oils (High in oleic acid) | A nutrient-dense oil used to combat environmental stress and deeply moisturize. |
| Mowrah Butter | 3 - 4 | Butters (High in oleic/palmitic acid) | A plant butter used similarly to cocoa or shea butter to lock in intense moisture. |
| Myreth-3 Myristate | 5 | Ester / Alcohols & Derivatives | A highly comedogenic synthetic ester used to condition the skin and improve slip. |
| Myristic Acid | 3 | Fatty Acid(s) & Derivatives | A fatty acid occurring naturally in nutmeg and palm oil, used as an emulsifier and cleanser base. |
| Myristyl Alcohol | 2 | Fatty Alcohol / Alcohols & Derivatives | A fatty alcohol used to stabilize formulas and prevent oil and water from separating. |
| Myristyl Lactate | 4 | Ester / Fatty Acids & Derivatives | A lactic acid ester used as a skin conditioning agent to provide a smooth, tack-free feel. |
| Myristyl Myristate | 5 | Ester / Fatty Acids & Derivatives | A waxy ester used heavily in lotions to create a rich, luxurious, but highly pore-clogging texture. |
| Myristyl Propionate | 4 | Ester | An emollient that reduces the greasy feel of creams while providing a moisture barrier. |
| Neem Butter | 5 | Butters | Neem oil solidified with heavy lipids, used for its strong antibacterial and healing traits. |
| Neem Oil | 5 | Oils (High in oleic acid) | A potent Indian botanical oil heavily used to treat acne and infections, despite its high rating. |
| Nori | 3 | Seaweed / Marine Algae | An edible red seaweed used in cosmetics for its high vitamin and amino acid content. |
| Norwegian Kelp | 3 - 5 | Seaweed / Marine Algae | A brown algae utilized for its exceptional ability to bind moisture to the skin surface. |
| Octyl Palmitate | 4 | Ester / Fatty Acids & Derivatives | Now commonly called Ethylhexyl Palmitate; a palm derivative used for "dry" lubrication. |
| Octyl Stearate | 5 | Ester / Fatty Acids & Derivatives | A heavy synthetic ester used to thicken and stabilize creams, leaving a thick barrier. |
| Octyldodecanol | 2 | Fatty Alcohol | A long-chain fatty alcohol used to soothe the skin and help dissolve other active ingredients. |
| Olea Europaea (Olive) Oil | 3 - 5 | Natural Oil / Vegetable Oils (High in oleic acid) | A classic, heavy culinary oil used for extreme dryness; can be disruptive to the skin barrier. |
| Oleic Acid | 3 - 5 | Fatty Acid(s) | A monounsaturated omega-9 fatty acid that is deeply moisturizing but notorious for causing acne. |
| Oleth-3 / Oleth-3 Phosphate | 2 - 5 | Surfactant / Emulsifier / Alcohols & Derivatives | A synthetic compound used to dissolve oils into water-based formulas. |
| Oleth-5 | 3 | Surfactant / Emulsifier / Alcohols & Derivatives | A surfactant and emulsifier derived from oleic acid used in cleansing products. |
| Oleth-10 | 2 - 4 | Surfactant / Emulsifier / Alcohols & Derivatives | Used to help fragrances and essential oils dissolve completely into cosmetic bases. |
| Oleyl Alcohol | 4 | Fatty Alcohol / Alcohols & Derivatives | An unsaturated fatty alcohol used as a thickener, emollient, and carrier for other ingredients. |
| Olive Butter | 5 | Butters | Olive oil hydrogenated into a solid state, used for intense, heavy barrier protection. |
| Padina Pavonica | 3 - 4 | Seaweed / Marine Algae | A brown algae used to stimulate the synthesis of glycosaminoglycans (like hyaluronic acid). |
| Palm Kernel Oil | 4 - 5 | Natural Oil / Oils | Extracted from the seed of the palm fruit; very high in lauric acid and heavily pore-clogging. |
| Palm Oil | 4 - 5 | Natural Oil / Oils (High in lauric acid) | Extracted from the fleshy fruit of palms; used to create thick, rich creams and soaps. |
| Palmaria Palmata | 3 | Seaweed / Marine Algae | Also known as Dulse; a red algae used for its skin-brightening and microcirculation benefits. |
| Palmitic Acid | 2 - 3 | Fatty Acid(s) & Derivatives | A fatty acid used to opacify formulas, act as a surfactant, and condition the skin. |
| Papaya Seed Oil | 2 - 3 | Natural Oil / Oils (High in oleic acid) | A fruit oil containing naturally exfoliating enzymes, used to brighten and moisturize. |
| Passionfruit (Maracuja) Seed Oil | 2 | Oils (High in linoleic acid) | A lightweight, fast-absorbing oil used to regulate sebum and calm inflammation. |
| Peach Kernel Oil | 2 - 4 | Natural Oil / Vegetable Oils (High in oleic acid) | A light, easily absorbed botanical oil used in delicate formulations like eye creams. |
| Peanut Oil | 2 - 3 | Natural Oil / Oils (High in oleic & palmitic acid) | A heavy vegetable oil used as an occlusive moisturizer in traditional salves. |
| Pecan Oil | 2 | Oils (High in oleic acid) | A soothing botanical oil used to moisturize dry skin without feeling overly heavy. |
| PEG 100 / PEG 150 Distearate | 2 | Emulsifier / Alcohols & Derivatives | Synthetic polymers used to cleanse the skin and thicken liquid formulations. |
| PEG 16 Lanolin (Solulan 16) | 4 - 5 | Lanolin Derivative / Lanolins | A chemically altered, water-soluble lanolin used to provide a rich feel to skin and hair. |
| PEG 200 Dilaurate | 3 | Emulsifier / Alcohols & Derivatives | A surfactant and emulsifying agent used primarily in cleansers and shampoos. |
| PEG 8 Castor Oil | 2 | Alcohols & Derivatives | Ethoxylated castor oil used to solubilize fragrances into water-based products. |
| PEG 8 Stearate | 3 | Emulsifier / Alcohols & Derivatives | An emulsifier used to keep oil and water mixed perfectly in lotions and creams. |
| PEG-40 Hydrogenated Castor Oil | 2 | Oils | Used predominantly to dissolve essential oils and fragrances into water without turning cloudy. |
| Pelvetia Canaliculata Extract | 4 | Marine Extract / Algae | A brown algae that survives extreme dehydration; used to protect skin from severe water loss. |
| Pentaerythrityl Tetraisostearate | 2 | Ester / Alcohols & Derivatives | A liquid emollient that adds water-resistance and a glossy finish to lipsticks and sunscreens. |
| Perilla Oil | 2 | Oils (High in ALA) | An oil extremely rich in alpha-linolenic acid, highly prized for its anti-inflammatory effects. |
| PG Caprylate/Caprate | 3 - 5 | Emulsifier / Alcohols & Derivatives | A mixture of propylene glycol and fatty acids used as a skin conditioning agent. |
| PG Dipelargonate | 2 - 4 | Emulsifier / Alcohols & Derivatives | A synthetic ester used to replace mineral oil; provides excellent spreadability and glide. |
| PG Monostearate | 3 | Emulsifier / Alcohols & Derivatives | Used to stabilize emulsions and opacify formulations, giving them a creamy white look. |
| Phytantriol | 2 | Alcohol / Sterols | An aliphatic alcohol used to enhance moisture retention and increase the absorption of vitamins. |
| Phytessence Wakame | 3 | Seaweed / Marine Algae | A specific kelp extract marketed for its ability to inhibit the breakdown of hyaluronic acid in the skin. |
| Plankton / Plankton Extract | 3 - 4 | Seaweed / Marine Botanicals / Marine Extract | Marine biomass used to deliver high doses of moisture, zinc, and protective enzymes. |
| Plum Seed Oil | 2 | Oils (High in oleic acid) | A fast-absorbing, fragrant oil used for its antioxidant benefits and non-greasy moisture. |
| Polyglyceryl-3-Diisostearate | 4 | Emulsifier / Alcohols & Derivatives | A heavy duty emulsifier used to formulate rich, water-in-oil creams (like nappy rash creams). |
| Porphyra / Porphyra Umbilicalis | 3 - 4 | Seaweed / Marine Algae | A red algae utilized heavily for its natural photo-protective (UV defense) properties. |
| Porphyridium Cruentum | 4 | Marine Extract / Algae | A red microalgae that secretes a unique protective mucilage; used to hydrate and soothe. |
| Potassium Chloride | 5 | Mineral Salt / Viscosity Modifier / Minerals | A mineral salt used to increase the thickness of the water portion of cosmetic formulas. |
| PPG 10 Cetyl Ether | 3 - 4 | Emulsifier / Alcohols & Derivatives | A synthetic compound used to condition the skin and improve the texture of lotions. |
| PPG 12 PEG 65 Lanolin Oil | 2 - 4 | Lanolin Derivative / Lanolins | A highly processed, water-soluble lanolin used as an emollient in hair and skincare. |
| PPG 2 Myristyl Propionate | 3 - 4 | Ester / Alcohols & Derivatives | An emollient that leaves a smooth, velvety feel on the skin without excessive oiliness. |
| PPG 5 Ceteth 10 Phosphate | 4 | Surfactant / Emulsifier / Alcohols & Derivatives | A synthetic surfactant that helps mix oil and water while conditioning the skin. |
| Prickly Pear Seed Oil | 1-2 | Oils (High in linoleic acid) | A luxury, lightweight cactus oil exceptional at brightening and hydrating without clogging pores. |
| Propylene Glycol Monostearate | 4 | Emulsifier | A lipid used as a co-emulsifier to stabilize creams and create smooth, opaque textures. |
| Pumpkin Seed Oil | 2 - 3 | Natural Oil / Oils (High in linoleic acid) | An oil rich in zinc and antioxidants, used to lift, firm, and hydrate the skin. |
| Rapeseed Oil | 4 | Natural Oil | Another name for Canola oil; a basic, inexpensive vegetable oil used as a cosmetic base. |
| Red Algae | 5 | Marine Extract / Seaweed / Marine Algae | A broad class of seaweeds used for gelling and intense hydration; highly comedogenic. |
| Rice Bran Oil | 5 | Oils (High in oleic & linoleic acid) | A deeply hydrating oil rich in squalane and enzymes, traditionally used in Japanese skincare. |
| Rockweed | 3 - 4 | Marine Extract / Seaweed / Marine Algae | A type of brown algae (similar to bladderwrack) used to soothe and remineralize the skin. |
| Rosehip Seed Oil / Butter | 1 - 5 | Natural Oil / Oils / Butters (High in linoleic acid) | Highly prized oil rich in natural Vitamin A (retinoic acid); excellent for scars and aging. |
| Safflower Oil (Cooking variety) | 4 | Vegetable Oils (High in oleic acid) | The high-oleic (chemically modified for cooking) version of safflower; acts as a heavy pore-clogger. |
| Sal Seed Butter | 3-4 | Butters (High in stearic acid) | A hard botanical fat used to prevent skin dryness and stabilize emulsion structures. |
| Sandalwood Seed Oil | 2 | Natural Oil / Oils | An oil derived from sandalwood tree seeds, used to calm inflammation and provide moisture. |
| Sargassum / Sargassum Extract | 3 - 4 | Seaweed / Marine Algae | A brown algae used to protect the skin barrier and deliver marine minerals. |
| Seaweed / Sea Grass / Sea Whip | 3-5 | Seaweed / Marine Botanicals | Blanket terms for oceanic botanicals; generally fantastic for anti-aging but terrible for acne. |
| Sesame Oil / Sesame Seed Oil | 3 - 5 | Natural Oil / Vegetable Oils (High in linoleic/oleic) | A heavy, traditional Ayurvedic oil used for deep tissue massage and intense moisturization. |
| Shark Liver Oil | 3 | Animal Oil / Oils | The traditional, non-vegan source of Squalene; used to deeply lubricate and soften skin. |
| Sodium Alginate | 4 | Polysaccharide | Derived from seaweed; a water-binding agent used to create thick, bouncy gels. |
| Sodium Laureth Sulfate (SLES) | 3 | Surfactant / Cleanser / Detergents | A common, less-irritating foaming cleanser used in face washes and shampoos. |
| Sodium Lauryl Sulfate (SLS) | 5 | Surfactant / Cleanser / Detergents | A highly irritating, barrier-disrupting foaming agent heavily linked to acne flare-ups. |
| Solulan 16 | 4 | Lanolin Derivative | A trademarked name for ethoxylated lanolin, used to provide a rich feel to cosmetics. |
| Sorbitan Isostearate | 2 - 3 | Emulsifier / Alcohols & Derivatives | An emulsifier often used to stabilize water-in-oil formulas like foundations. |
| Sorbitan Laurate | 2 | Emulsifier | A mild cleansing agent and emulsifier that is generally well tolerated by skin. |
| Sorbitan Oleate | 3 | Emulsifier / Alcohols & Derivatives | A surfactant used to blend formulas; derived from oleic acid, giving it a higher clog factor. |
| Spirulina | 3 - 4 | Seaweed / Marine Algae / Marine Botanicals | A blue-green microalgae packed with B-vitamins, used to detoxify and nourish skin. |
| Squalene (Shark derived) | 3 | Animal Oil / Hydrocarbon / Oils | An unstable, heavy oil (unlike the stable, non-comedogenic Squalane) used for hydration. |
| Steareth-10 | 4 | Surfactant / Emulsifier / Alcohols & Derivatives | A polyethylene glycol ether of stearic acid used to cleanse and emulsify formulas. |
| Steareth-2 / Steareth-20 | 2 | Surfactant / Emulsifier / Alcohols & Derivatives | Common emulsifiers used together to create highly stable, smooth cosmetic creams. |
| Stearic Acid | 2-3 | Fatty Acid(s) & Derivatives | A waxy fatty acid used to thicken lotions, stabilize formulas, and act as a mild cleanser. |
| Stearic Acid TEA | 3 | Soap / Emulsifier | A salt formed by Stearic Acid and Triethanolamine; functions as a basic soap and emulsifier. |
| Stearyl Alcohol | 2 | Fatty Alcohol / Alcohols & Derivatives | A fatty alcohol used to soothe skin, bind oil and water, and thicken cosmetic formulas. |
| Stearyl Heptanoate | 4 | Ester / Fatty Acids & Derivatives | A synthetic ester used to leave a water-repellent, non-greasy film on the skin. |
| Sulfated Castor Oil | 3 | Surfactant / Emulsifier / Miscellaneous | Also known as Turkey Red Oil; the only oil that dissolves in water, used in bath oils. |
| Sulfated Jojoba Oil | 3 | Surfactant / Emulsifier / Oils (High in eicosenoic acid) | Chemically altered jojoba oil used to provide conditioning while washing away clean. |
| Sunflower Oil (GMO) / Butter | 1-5 | Oils / Butters (High in linoleic acid) | A widely used, inexpensive carrier oil; high-linoleic is acne-safe, but high-oleic (cooking) is not. |
| Sweet Almond Oil / Butter | 3-5 | Oils / Butters (High in oleic acid) | A deeply nourishing, classic emollient used to relieve dryness and itching. |
| Tallow | 2 - 4 | Animal Fat / Fats (High in oleic acid) | Rendered animal fat (usually beef or mutton) used as a highly bio-compatible, occlusive moisturizer. |
| Tamanu Oil / Butter | 2 - 5 | Natural Oil / Oils / Butters (High in oleic & linoleic) | A thick, green, pungent oil highly prized for extreme wound-healing and scar fading. |
| Tocopherol (Vitamin E) | 0-3 | Vitamin / Antioxidant / Vitamins & Herbs | A naturally occurring antioxidant used to prevent oils in cosmetics from going rancid. |
| Tomato Seed Oil | 2 | Oils (High in linoleic acid) | An oil rich in lycopene and linoleic acid, used to combat free radical damage and hydrate. |
| Tribehenin | 5 | Waxes | A mixture of glycerin and behenic acid used as a conditioning agent and formula thickener. |
| Triethanolamine | 2 | pH Adjuster | An alkaline substance used to balance the pH of cosmetic formulations. |
| Ulva Lactuca | 3 - 4 | Seaweed / Marine Algae | Known as "sea lettuce," a green algae utilized to stimulate cellular turnover and hydrate. |
| Undaria / Undaria Pinnatifida | 2 - 4 | Seaweed / Marine Algae | Known as Wakame; a brown kelp used for advanced anti-aging and hydration. |
| Vitamin A Palmitate | 2 - 3 | Vitamin Derivative / Vitamins & Herbs | A gentler, less irritating ester form of retinol used for anti-aging and cell turnover. |
| Wakame | 3 - 4 | Seaweed / Marine Algae | A brown kelp extract rich in fucoidan, used to soothe and heavily hydrate the skin. |
| Walnut Seed Oil | 2 | Oils (High in linoleic acid) | A lightweight botanical oil with astringent properties used to condition the skin. |
| Water-Soluble Sulfur | 3 | Preservatives & Additives | A sulfur derivative used to target acne and inflammation by dissolving surface skin cells. |
| Wheat Germ Glyceride | 3 | Emulsifier / Alcohols & Derivatives | An emulsifier and emollient derived from wheat germ oil, used to soften and condition. |
| Wheat Germ Oil | 5 | Natural Oil / Oils (High in linolenic acid) | An exceptionally heavy oil packed with Vitamin E, highly comedogenic but intensely moisturizing. |
| Xylene | 4 | Solvent / Miscellaneous Solvents | A harsh solvent occasionally found in nail polishes and specific chemical formulations. |
| Zea Mays (Corn Starch) | 4 | Miscellaneous | A fine powder used to absorb oil and provide a matte finish in makeup; can trap bacteria in pores. |
High-Risk Ingredient Categories to Watch Out For
While it is impossible to memorize all the ingredients that clog pores, you can protect your skin by looking out for these notorious categories that frequently score a 4 or 5:
Algae and Seaweeds: Ingredients like Algae Extract, Red Algae, and Irish Moss (often rated 5) are highly comedogenic despite being marketed as “natural” or “hydrating.”
Heavy Oils and Butters: While Hemp Seed Oil (Rated 0) is perfectly safe, heavy oils like Wheat Germ Oil (Rated 5), Coconut Oil (Rated 4-5), and Cocoa Butter (Rated 4) should be kept away from acne-prone faces.
Synthetic Esters: Chemicals that end in “-ate” like Isopropyl Myristate (Rated 5) and Isopropyl Palmitate (Rated 4) are extremely common in foundations and moisturizers to give them a silky feel, but they are notorious for causing texture and closed comedones.
If you are currently experiencing a flare-up, we recommend checking your current routine with our Skincare Ingredient Checker to see if a hidden trigger is to blame.
Building an Acne-Safe Routine
Once you have identified the pore clogging ingredients in your current cabinet, it is time to swap them for safer alternatives. Look for products containing Squalane, Hyaluronic Acid, or Glycerin, which typically score a 0 on the scale.
To find verified products that are 100% free from these triggers, explore our expert-ranked roundups.