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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.
Ceramides get the credit but cholesterol is the barrier's third leg; here's why a 3:1:1 lipid ratio matters more than ceramide percentage…
Sodium PCA is a humectant your skin produces naturally and depletes with age; here's the topical case and where it pairs best…
Beta-glucan holds water and calms inflammation at the same time; here's the oat- and yeast-derived hydrator that deserves more shelf space for…
HEPES is technically a pH buffer but loosens dead cells like a gentle acid; here's what it does and which routines benefit…
Thiamidol is the patented Eucerin tyrosinase inhibitor with surprisingly strong melasma data; here's the evidence and where it falls short for any…
Kojic acid brightens through fermentation chemistry but causes patch-test failures often; here's how to use it without sensitising skin in everyday skin…
Alpha arbutin is the brightener with the safest record on melanin-rich skin; here's the mechanism, the timeline and how to layer it…
Gluconolactone is the PHA that exfoliates without stinging; here's what it does, who it suits and how to spot it on an…
PHAs sit between AHAs and BHAs in strength and gentleness; here's why gluconolactone earns a daily slot when other acids irritate in…
Argireline is sold as topical Botox but the clinical effect is small; here's what the peptide really does and where it earns…
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.