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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.
Ectoin is a stress-tolerance molecule from desert microbes. Here's why dermatologists now put it in barrier serums for sensitive, reactive skin in…
Bifida ferment lysate sits behind SK-II and a dozen newer serums. Here's the mechanism, the clinical evidence and who it suits best…
Lactobacillus ferment lysate is the postbiotic running most microbiome serums. Here's what the clinical data shows and who actually benefits in 2026.
Copper peptides (GHK-Cu) have fifty years of research behind them: collagen, wound healing, anti-inflammatory action. Quietly excellent, rarely viral.
The most useful active most people aren't using. Slow, gentle, and quietly capable of handling three different concerns at once.
Centella asiatica — also called gotu kola, also branded as cica — has the strongest clinical evidence of any K-beauty soothing ingredient.…
Argan is genuinely excellent for dry skin, mature face, body, and hair. It's also too heavy for most oily and acne-prone faces.…
Peptides are short chains of amino acids that tell your skin to do something specific. Different peptides do different jobs. Most product…
PDRN is short fragments of salmon DNA that bind to a receptor on your fibroblasts. The mechanism is weirder than it sounds,…
Coconut oil is excellent for hair, decent for body, and reliably terrible for most faces. The assumption that 'natural' means 'gentle' falls…
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.