The library

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.

All 2277 ingredients — page 41 of 95

Soothing
Hydrolyzed Viola Tricolor Extract

A hydrolyzed extract from Viola tricolor (wild pansy) enriched with flavonoids and hydroxycinnamic acids, used as a soothing and antioxidant skin-conditioning agent.

soothingantioxidantskin-conditioning
Calms and soothes irritated skinAntioxidant protection from flavonoids (rutin, violanthin)Mild skin-conditioning
Humectant
Hydrolyzed Wheat Protein

A mixture of peptides and amino acids obtained by hydrolysis of wheat protein, used as a humectant and film-forming skin-conditioning agent.

humectantfilm-formerskin-conditioning
Attracts and binds moisture to skinForms a light film to improve skin feel and reduce transepidermal water lossStrengthens and conditions the skin surface
May cause reactions in individuals with severe wheat or gluten allergy (rare in topical use but documented)
Active
Hydrolyzed White Lupine Protein
HYDROLYZED LUPINE PROTEIN

Hydrolyzed proteins from white lupine (Lupinus albus). Contains short peptides that stimulate elastin and fibronectin production in the dermis, improving skin firmness. Used as a plant-based alternative to animal collagen in firming formulations.

skin-firmingskin-conditioninghumectant
Stimulates elastin synthesis — improves skin firmness and elasticityProtein conditioning and smoothingPlant-based collagen alternative
May cause reactions in people with legume/pea allergies
+ Niacinamide+ Retinol
Other
Hydrolyzed Yeast
HYDROLYZED YEAST

The full hydrolysate of yeast cells (Saccharomyces cerevisiae), distinct from the isolated protein fraction. Contains polysaccharides, amino acids, vitamins, and minerals for multi-faceted skin conditioning.

skin-conditioningmoisturising
Provides broad-spectrum conditioning from yeast cell constituentsSupports skin hydrationSource of B-vitamins and minerals
+ Hydrolyzed Yeast Protein+ Acetyl Glutamine
Active
Hydrolyzed Yeast Protein
HYDROLYZED YEAST PROTEIN

The protein fraction obtained by hydrolysis of Saccharomyces cerevisiae yeast cells. Rich in amino acids, peptides, and growth factors that condition skin, support collagen production, and improve skin texture.

skin-conditioningmoisturisinganti-aging
Provides amino acids and peptides that support collagen synthesisConditions and firms skinSupports moisture retention
+ Hydrolyzed Yeast+ Acetyl Glutamine+ Adenosine
Antioxidant
Hydroxyacetophenone

A multifunctional antioxidant that calms skin and enhances the performance of preservative systems.

antioxidantsoothingpreservative-booster
Antioxidant protectionSoothes irritationBoosts preservative efficacy and formula stability
+ Tocopherol+ Niacinamide
Other
Hydroxyapatite
HYDROXYAPATITE

A naturally occurring calcium phosphate mineral (Ca₁₀(PO₄)₆(OH)₂) used in cosmetics as a texture agent, absorbent, and opacifier. Also used in dental products for enamel support.

skin-conditioningabsorbenttexture-enhancing
Mineral-derived ingredient naturally found in teeth and boneAbsorbs sebum and smoothes textureUsed in some formulas for remineralising claims
+ Silica+ Sericite
Other
Hydroxycellulose

A cellulose derivative produced by partial substitution of hydroxyl groups, used as a thickening, film-forming, and stabilizing agent in cosmetic formulations.

Viscosity increasingFilm-formingBinding
Thickens and stabilizes formulationsProvides smooth, even textureFilm-forming for improved skin feel
Inert polymer; very low risk profile
Fragrance
Hydroxycitronellal

A synthetic floral fragrance chemical (CAS 107-75-5) with a rose/lily scent profile, regulated as a mandatory-declaration fragrance allergen under EU Cosmetics Regulation and Annex III as amended by Regulation (EU) 2023/1545.

fragrancemasking
Imparts a soft rose/lily floral fragrance note to cosmetic formulations
EU mandatory fragrance allergen (Reg. 2023/1545) — must be declared on label above threshold concentrationsKnown contact sensitizer; can trigger allergic contact dermatitis in sensitized individuals
Antioxidant
Hydroxydecyl Ubiquinone

A synthetic CoQ10 analogue (idebenone) in which the isoprene side chain is replaced by a shorter 10-carbon chain bearing a terminal hydroxyl group, improving its solubility and cellular membrane penetration relative to ubiquinone.

antioxidantskin conditioning
Potent antioxidant — neutralises free radicals and reactive oxygen speciesMore bioavailable than CoQ10 due to shorter, hydroxylated side chainReduces appearance of fine lines and wrinkles with continued use
Rare cases of allergic contact dermatitis reported in post-market surveillanceSensitisation potential — patch-test recommended for sensitive or reactive skin
+ Tocopherol+ Ascorbic Acid+ Niacinamide
Other
Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer

A synthetic acrylic copolymer (trade name Sepimax Zen) used to thicken and stabilize formulas, producing a smooth, cushiony gel-cream texture.

thickeneremulsion-stabilizer
Creates lightweight, cushiony gel texturesStabilizes emulsions without tackiness
Humectant
Hydroxyethyl Urea

A gentle urea-derived humectant that hydrates without the roughness of high-dose urea.

humectant
Hydration
Other
Hydroxyethylcellulose

A water-soluble cellulose ether used to thicken and stabilize aqueous cosmetic formulas such as gels, serums, and lotions.

thickenerfilm-former
Creates smooth gel texturesStabilizes emulsions and suspensions
Other
Hydroxyethylpiperazine Ethane Sulfonic Acid

A zwitterionic biological buffer (HEPES) used in cosmetics to stabilize formula pH and provide gentle exfoliation by promoting keratinocyte shedding.

ph-adjusterbufferexfoliant
Stabilizes and buffers formula pHGentle exfoliating action by loosening dead skin cellsPromotes cell renewal and skin smoothness
Humectant
Hydroxyethylurea
HYDROXYETHYL UREA

A modified form of urea with a hydroxyethyl group. Functions as a gentle humectant — less irritating than urea while retaining moisturizing properties. Used in Ishizawa's urea skincare line alongside regular urea.

humectantskin-conditioning
Milder version of urea — gentle humectantGood for very sensitive skinMoisturizing without the stinging potential of high-concentration urea
+ Urea+ Glycerin+ Hyaluronic Acid
Barrier support
Hydroxypalmitoyl Sphinganine

A phytosphingosine-derived lipid that supports the skin barrier and helps soothe.

barrier-support
Supports the moisture barrierSoothing
+ Ceramide NP+ Phytosphingosine
Humectant
Hydroxyproline

A non-proteinogenic amino acid and key component of collagen used in cosmetics as a humectant; its presence in the NMF supports hydration and signals collagen stabilization.

humectantamino-acid
Attracts and retains moisture as a collagen-derived amino acidSupports collagen synthesis and skin firmnessComponent of the skin's natural moisturizing factor
Barrier support
Hydroxypropyl Bislauramide MEA

A ceramide-analogue from the SKIN-MIMIC technology with lauroyl (C12) chains on a hydroxypropyl-MEA backbone; used alongside Hydroxypropyl Bispalmitamide MEA in Aestura Atobarrier 365 formulations.

ceramide-analoguebarrier-repairskin-conditioning
Supports barrier lipid structure analogous to ceramidesReduces transepidermal water lossSuitable for sensitive and atopic skin types
Barrier support
Hydroxypropyl Bispalmitamide MEA

A ceramide-like lipid from the SKIN-MIMIC technology combining a hydroxypropyl backbone with two palmitoyl chains and an MEA headgroup, integrating into the skin's intercellular lipid bilayer.

ceramide-analoguebarrier-repairskin-conditioning
Reinforces the skin lipid barrier via ceramide-like structureReduces transepidermal water lossUsed in Aestura Atobarrier 365 for sensitive skin barrier support
Other
Hydroxypropyl Cellulose
HYDROXYPROPYL CELLULOSE

A cellulose ether with hydroxypropyl groups. Used as a thickener, binder, and film-forming agent in skincare. Provides a smooth, gel-like consistency. Commonly used in Kanebo toners.

viscosity-increasingfilm-formerbinder
Thickens without grittinessFilm-forming and binding
+ Xanthan Gum+ Carbomer
Other
Hydroxypropyl Cyclodextrin

A hydroxypropyl-modified cyclodextrin that forms hollow, cage-like molecular structures to encapsulate actives, improving their stability, solubility, and skin delivery.

encapsulantstabilizersolubilizer
Encapsulates and stabilizes active ingredients including retinol and vitaminsImproves solubility and bioavailability of lipophilic activesReduces irritation potential of encapsulated ingredients
Other
Hydroxypropyl Methylcellulose

A semi-synthetic cellulose ether used as a film-former, thickener, and binder in cosmetic serums, gels, and eye-area products.

film-formerthickenerbinder
Thickens and stabilizes formulasForms a smoothing film on skin
Other
Hydroxypropyl Methylcellulose Stearoxy Ether
HYDROXYPROPYL METHYLCELLULOSE STEAROXY ETHER

A cellulose derivative modified with both hydroxypropyl-methyl and stearoxy groups. Used primarily in Japanese sunscreen formulas (notably Shiseido/Elixir SPF products) to create a smooth, non-tacky film-forming gel texture.

gelling agentfilm-formertexture enhancer
Creates a unique lightweight gel texture in sunscreensImproves SPF formula stability and spreadability
+ Distearyldimonium Chloride+ Dimethicone
Other
Hydroxypropyl Starch Phosphate

A chemically modified starch derivative used as a thickener and film-former to improve formula texture and stability.

thickenerfilm-formertexture-enhancer
Thickens and stabilizes formulasCreates a light, smooth skin feelUsed as a natural-origin alternative to synthetic thickeners