Ingredients
Snail mucin: the science behind the slime
Snail secretion filtrate sounds like an internet joke. The clinical evidence is genuinely interesting. Here's what's in it, what it does, and…
Category
Ingredients
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.
Browse Ingredients
Retinoids & Bakuchiol
Retinol, retinal, tretinoin, bakuchiol — every option, decoded.
Vitamin C
Every form of vitamin C — LAA, SAP, MAP, THD, glucoside.
Niacinamide
The all-rounder vitamin B3, properly explained.
Peptides
Signal, carrier, neuropeptides — and which actually work.
Acids (AHA / BHA / PHA)
The exfoliant family from gentlest to strongest.
Hydrators
Hyaluronic acid, glycerin, polyglutamic acid, beta-glucan.
Ceramides & Lipids
Barrier-repair lipids the skin actually uses.
Microbiome Ingredients
Pre/pro/postbiotics, ferments, and biome-friendly botanicals.
Korean & Biotech Actives
PDRN, exosomes, EGF, snail mucin, propolis, galactomyces.
Sunscreen Filters
Mineral, chemical, and what's actually FDA-approved in the US.
Latest in Ingredients
Ingredients
Tea tree oil in skincare: when it helps, when it hurts
Tea tree oil is real medicine and a real irritant. Most of the advice you'll find online about it is dangerous. Here's…
Ingredients
Rosehip oil: skincare hype vs actual science
Rosehip oil is marketed as a miracle. The reality is more modest, and oxidation makes it tricky to actually deliver what the…
Hydrators
Glycerin is skincare’s quiet MVP. Here’s why
Glycerin sits quietly in almost every well-formulated moisturizer, doing the work people credit to hyaluronic acid. The case for the cheaper humectant.
Ingredients
Pre, pro, and postbiotics in skincare: a no-nonsense guide
Pre, pro, and postbiotics get labeled interchangeably, and most so-called probiotic skincare is actually postbiotic. Here's the difference and why it matters.
Ingredients
Vitamin C in skincare: forms, concentrations, and which one is right for you
Vitamin C isn't a single molecule. It's at least seven, and the differences in stability, penetration, and irritation are bigger than the…
Acids (AHA / BHA / PHA)
Mandelic acid: the gentle AHA for sensitive and acne-prone skin
The AHA most people haven't heard of, and the one dermatologists keep quietly recommending for sensitive skin, acne, and skin of color.
Ingredients
Green tea (EGCG) in skincare: a reliable antioxidant, not a miracle
EGCG, the active in green tea, is a strong antioxidant with documented skin benefits. The marketing oversells. The reality is reliably useful…
Ingredients
Tranexamic acid: the quiet star of pigmentation treatment
Tranexamic acid started as a clotting medication for heavy bleeding. Dermatologists noticed something else happening, and now it sits at the center…
Acids (AHA / BHA / PHA)
Salicylic acid: how it works, how to use it, who should skip it
Salicylic acid is the BHA, and the only widely used one. It penetrates oil and clears pores in a way no AHA…
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.
How it's organized
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.
What an ingredient article includes
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.
Why we care about provenance
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.
Frequently asked questions
- Which skincare ingredient is the most important to add to a basic routine?
- After a cleanser, moisturizer, and SPF, the highest-impact addition is a vitamin C serum (morning) or a retinoid (night). Both have decades of clinical evidence for visible results.
- Are 'natural' ingredients better than synthetic ones?
- Not inherently. 'Natural' is a marketing term, not a safety or efficacy designation. Some plant-derived ingredients (essential oils, witch hazel) are more irritating than synthetic alternatives. Look at the molecule, not the source.
- How do I know if an ingredient is FDA-approved?
- Check the FDA's monograph for OTC drug ingredients (sunscreen filters, acne actives like salicylic acid and benzoyl peroxide). Cosmetic ingredients aren't 'approved' the same way — they fall under FDA cosmetic regulations. Each Elelaf ingredient article notes the regulatory status.
- Can I mix multiple active ingredients?
- Many actives layer well together. Some don't. The Ingredients library includes a layering guide for every active explaining what's safe to combine and what should go in opposite routines.