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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.
Matrixyl 3000 has more peer-reviewed collagen data than most peptide actives; here's the realistic outcome timeline and pairing rules in everyday skin…
Snow mushroom polysaccharide carries hydration with a smaller molecule than HA; here's what the molecular-weight data actually shows for skin for any…
Asiaticoside is centella's healing fraction, separate from its soothing cousin; here's what it does and how to read it on a label…
Madecassoside is the centella fraction with the strongest anti-inflammatory data. Here's why it deserves the spotlight over plain cica in any skin…
Polyglutamic acid is sold as 4x hyaluronic acid but works very differently. Here's the fermentation-derived humectant explained for real skin in 2026.
Epidermal growth factor serums claim to rebuild skin from inside. Here's what penetration and safety data actually say about EGF skincare in…
Amino acid cleansers are sold as the gentlest option. Here's how to read the INCI list properly and tell a real one…
sh-Oligopeptide-1 is the recombinant EGF hiding on your INCI. Here's what it does, who it suits and how it differs from copper…
Recombinant human collagen is engineered small enough to actually penetrate. Here's why the biotech version may quietly outperform marine collagen.
Exosome serums are everywhere in 2026. Here's a sober read of the latest studies, FDA stance, and which marketing claims are still…
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.