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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.
Niacinamide rarely 'purges', but it can flare fungal acne and high-percentage formulas can irritate. Here is how to read your breakout and…
Retinol plateau is real, but it isn't tolerance. Here is the four-cause map (oxidation, dose, vehicle, microbiome) and how to bring the…
Hot dog, metal, or sweat-sock smell on vitamin C means oxidation. Here is the chemistry, the colour shifts to watch for, and…
The skin microbiome resets in roughly three weeks. Here is what to look for at days 7, 14, and 21 if your…
Peptides 'firm' skin in subtle ways. Here is what a month of consistent copper and signal peptide application actually moves, with cutometer…
Topical tranexamic acid changes melasma slower than tablets but safely. We track week-by-week colourimetry results on two melasma testers across 60 days.
Azelaic moves PIH and rosacea slowly but reliably. Here is a fortnightly breakdown of what we saw in tester skin across 13…
By day 30, retinol changes pore appearance and surface smoothness. What it hasn't done yet is collagen remodelling. Here is the realistic…
Forget the 'brighter in 7 days' claims. Here is what vitamin C measurably changes in two weeks (and what needs 8 to…
Ceramides don't 'repair' broken skin overnight. Here is what they replace, what they don't, and how long the rebuild actually takes by…
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.