The Definitive Skincare Ingredient Glossary
Bridging the gap between laboratory science and your bathroom shelf. Explore over 200 terms, ingredients, and biological processes defined with clinical precision by cosmetic chemist Chloé Fournier.
Why Ingredient Literacy Matters in 2026
The modern skincare landscape is saturated with marketing buzzwords like "clean," "non-toxic," and "clinical strength." However, these terms often lack regulatory definitions. True empowerment comes from understanding the International Nomenclature Cosmetic Ingredient (INCI) system.
As a cosmetic chemist, my goal is to strip away the hype and focus on the molecular efficacy of ingredients. Whether you are curious about the difference between
Understanding formulation isn't just about spotting "hero" ingredients; it's about recognizing the supporting cast—the emulsifiers, preservatives, and penetration enhancers that make a product safe and effective.
Instant Ingredient Decoder
Search our database for common skincare ingredients to see their function, skin type suitability, and safety profile.
Function
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Enter an ingredient above to reveal its scientific profile.
Expert Categorized Glossary
The Acid Hierarchy (Exfoliants & PH)
Alpha Hydroxy Acids (AHAs)
Water-soluble acids derived from sugary fruits. They work by ungluing the bonds holding dead skin cells to the surface. Examples: Glycolic, Lactic, Mandelic.
Beta Hydroxy Acid (BHA)
Polyhydroxy Acids (PHAs)
Hyaluronic Acid
Azelaic Acid
Stratum Corneum (The Skin Barrier) ↓
Transepidermal Water Loss (TEWL) ↓
Microbiome ↓
Oxidative Stress ↓
