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Category
Know exactly what's in the bottle and why it matters.
Quick answer
The Ingredients library is the most thorough English-language reference for skincare actives we know how to build. Each entry breaks down what an ingredient is, the mechanism by which it works, the clinical evidence behind it, who should and shouldn't use it, and how to layer it without canceling other actives.
Retinol, retinal, tretinoin, bakuchiol — every option, decoded.
Every form of vitamin C — LAA, SAP, MAP, THD, glucoside.
The all-rounder vitamin B3, properly explained.
Signal, carrier, neuropeptides — and which actually work.
The exfoliant family from gentlest to strongest.
Hyaluronic acid, glycerin, polyglutamic acid, beta-glucan.
Barrier-repair lipids the skin actually uses.
Pre/pro/postbiotics, ferments, and biome-friendly botanicals.
PDRN, exosomes, EGF, snail mucin, propolis, galactomyces.
Mineral, chemical, and what's actually FDA-approved in the US.
Vitamin C went from scurvy prevention to glow-serum staple. Here is the full timeline from 1930s isolation through modern L-ascorbic acid serums.
Sunscreen has existed for nearly a century. Trace it from WWII pilot zinc paste to broad-spectrum SPF and modern UV filter regulation…
Retinoids were discovered by accident while researchers were actually trying to treat acne. Here is the full timeline from vitamin A deficiency…
Squalane is sold as universally safe. For congested oily skin the case is much weaker. Here is a slow, honest rethink, plus…
Sweet almond oil shows up in DIY and beginner routines, but allergy and oxidation risk are real. Here is why a slow-skincare…
Engineered postbiotic lysates are the microbiome category replacing live-bacteria hype in 2026. Here is how they differ, how they work and where…
Galactomyces, Pitera and Saccharomyces evolved through 2025. Here is what is genuinely new in 2026 fermented yeast skincare and what is recycled…
Plant-derived exosomes are sprinkled across 2026 launches with wildly different sources and concentrations. Here is an honest audit of the evidence.
Topical EGF (sh-oligopeptide-1) returns in 2026 with stronger formulas and lingering safety questions. Here is a slow, honest read of current evidence.
Type III recombinant collagen is appearing in 2026 launches and behaves differently from Type I. Here is a clean comparison of types,…
Modern skincare is an ingredient game. Brand names matter less than the molecules inside the bottle, and the brands that succeed are the ones that explain those molecules honestly. The Ingredients library exists because nobody else is doing this work at the depth and clarity it deserves.
Ten subcategories cover the whole field: Retinoids & Bakuchiol (the cell-turnover family), Vitamin C (every form, from L-ascorbic acid to ascorbyl glucoside), Niacinamide, Peptides, Acids (AHA, BHA, PHA), Hydrators (hyaluronic acid, glycerin, polyglutamic acid), Ceramides & Lipids, Microbiome Ingredients (pre/pro/postbiotics, ferments), Korean & Biotech Actives (PDRN, exosomes, snail mucin), and Sunscreen Filters.
Every entry follows the same structure. A 60–90 word quick-answer up top so you can leave with the key facts in 30 seconds. Then the science, in plain English. Then the clinical evidence, with citations and publication dates so you can verify. Pairing rules, side effects, who should avoid, recommended concentrations, and which forms are FDA-approved in the US.
Elelaf is FDA-approved and manufactured in South Korea — the world's most innovative skincare lab ecosystem. We pay close attention to which ingredients are approved where, and which are still under regulatory review (looking at you, exosomes). Our ingredient pages will always tell you the regulatory status, not just the marketing claim.