Ingredient library
Every ingredient SkinAtlas knows about — all 2277 of them. What each one does, what it works well with, and what to watch for.
An extract of field horsetail (Equisetum arvense) that is naturally rich in silica, flavonoids, and minerals, used in cosmetics to support collagen production, improve skin elasticity, and provide antioxidant protection.
An extract specifically derived from the leaves (aerial parts) of Equisetum arvense (common horsetail), notable for its high silica and flavonoid content that provides soothing, conditioning, and antioxidant benefits.
Ergothioneine (L-ergothioneine, EGT) is a naturally occurring amino thione acid originally found in ergot fungi. It is synthesized in nature only by fungi and certain bacteria, but is avidly accumulated by human cells (especially tissues under oxidative stress) via the highly specific OCTN1 transporter. This unique cellular uptake mechanism distinguishes ergothioneine from most antioxidants — it is actively concentrated inside cells rather than merely acting on the surface. In cosmetics it functions as a premium anti-aging antioxidant active used in high-performance vitamin C ampoules and anti-aging serums.
Extract from the leaves of Eriobotrya japonica (loquat/Japanese plum). Contains flavonoids (rutin, quercetin), ursolic acid, and tannins that provide antioxidant and soothing benefits. Used in Shiseido's d program acne-care range.
A botanical extract obtained from the cotton-like head and stem of Nordic cottongrass, used for skin conditioning and moisturization.
Leaf extract from Eruca sativa (arugula/rocket), a cruciferous plant. Contains glucosinolates, flavonoids, and erucic acid derivatives contributing antioxidant activity.
A small sugar alcohol that acts as a humectant, drawing water into the skin.
A triterpenoid saponin isolated from horse chestnut (Aesculus hippocastanum) seeds, used in cosmetics to strengthen capillary walls, reduce puffiness, and provide anti-inflammatory and antioxidant benefits.
A collective term for volatile aromatic compounds distilled from plants. Used for scent and sometimes minor antimicrobial effects. Common sensitizers — individual oils (lavender, tea tree, peppermint, etc.) vary widely in risk profile.
A small molecule containing both an amine and a hydroxyl group. Used as a pH adjuster and to neutralize fatty acids (forming soaps) in cosmetic formulations. Considered safe in rinse-off products; use in leave-on products is regulated in EU.
A clear glycol ether solvent used to dissolve and stabilize difficult actives, enhance ingredient penetration, and provide mild humectancy in cosmetic formulas.
A stable, both water- and oil-compatible vitamin C derivative that converts to ascorbic acid in skin. Valued for brightening with good formula stability.
A glycoside ester of glucose and ethanol. Functions as a gentle humectant. Used in Kanebo's Skin Harmonizer for its moisturizing and skin-conditioning properties.
A branched-chain diol (CAS 94-96-2) used as a solvent and preservative booster in cosmetics; distinct from 1,2-hexanediol and historically also used as an insect repellent.
The ethyl ester of oleic acid used as a lightweight, penetrating emollient and delivery solvent in skincare formulas.
The ethyl ether derivative of cellulose. Functions primarily as a film-former and texture/viscosity modifier in cosmetic formulas. Used in a range of products from foundations to hair care to improve consistency, adherence, and skin feel. Not a functional skin-care active.
A synthetic copolymer used as a film former and emulsion stabilizer in cosmetics.
A synthetic copolymer of ethylene and methacrylic acid monomers used in cosmetic formulations as a film-forming and texture-modifying agent.
A synthetic hydrocarbon copolymer used primarily in anhydrous cosmetic formulations as a gelling agent and viscosity modifier.
2-Ethyl-1,3-hexanediol, a branched glycol with both humectant and antimicrobial properties. Structurally related to 1,2-Hexanediol and Caprylyl Glycol, which are also used as preservative boosters. Used at low concentrations (typically 0.1–1%) to extend the spectrum and efficacy of primary preservation systems. Distinct from 1,2-Hexanediol (which is 1,2-substituted rather than 1,3-substituted) and 1-Hexanediol.
The ester of 2-ethylhexanol (a C8 branched alcohol) and isononanoic acid (a C9 branched fatty acid). Produces a distinctly lightweight, fast-absorbing emollient with virtually no residual greasiness. Widely used as an alternative to mineral oil derivatives in lightweight facial creams and sunscreens, where its low viscosity and high UV-filter solubility are prized.
A common chemical UVB filter (octinoxate) permitted up to 10% in EU and 7.5% in US sunscreens, with confirmed endocrine activity at high doses per 2025 SCCS opinion.
A UVA-absorbing photostabilizer (Hallstar SolaStay S1) that prevents degradation of avobenzone and other UV filters via singlet-state quenching; listed in EU CosIng (ref 87035) as a photostabilizer but not as an Annex VI approved UV filter.
A lightweight ester of 2-ethylhexanol and olive oil fatty acids used as an emollient and skin-conditioning agent with good spreadability and a non-greasy feel; distinct from hydrogenated ethylhexyl olivate.