COSRX
Snail 96 Mucin Power Essence
Key ingredient: Snail Secretion Filtrate
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For barrier-damaged or post-acne-mark skin, the COSRX Advanced Snail 96 Mucin Power Essence delivers 96% snail secretion filtrate — the highest concentration consumer essence on the market and the category benchmark since 2014.
The ingredient story
Hero ingredient
Snail Secretion Filtrate (Helix Aspersa Muller Glycoconjugate)
Concentration
96% by weight
Deep-dive
Read the full guide →How it works
The glycoproteins and glycosaminoglycans in snail secretion bind water and form a hydrating film on the skin surface, while smaller peptides and allantoin signal keratinocytes and fibroblasts to migrate — the same cellular activities snails use to repair their own tissue. A trace amount of naturally-occurring glycolic acid contributes very mild surface exfoliation.
What the evidence shows
Fabi et al. (2013) showed measurable improvements in periorbital wrinkles and skin texture after twelve weeks of SCA filtrate use. The 96% concentration in this product is the highest stable formulation tested at consumer scale; higher concentrations are technically possible but lose efficacy faster as the preservative system thins out.
Anyone with a mollusc allergy should skip this. Strict vegan routines should pick a fermented plant alternative.
The brand
Philosophy
“Skin-friendly ingredients delivered at high concentration without unnecessary additives.”
COSRX (a portmanteau of "Cosmetics + RX") was founded in 2013 in Seoul with an explicit thesis: take ingredients that dermatologists already trusted (snail mucin, BHA, niacinamide, centella) and put them into single-active products at meaningful concentrations, sold direct-to-consumer at prices that bypassed the inflated department-store margin. The Snail 96 Mucin Power Essence, launched in 2014, was the breakthrough product — a 100ml bottle of 96% snail secretion filtrate for under £20. Within five years it had over 500,000 reviews across major beauty platforms and had effectively created the global "snail mucin" category. COSRX is now the most-recognised K-beauty brand in Western markets, and the snail essence remains its anchor product.
Where this fits in your routine
Routine step
Essence — step 4 in the classic Korean routine (after toner, before serum)
Morning: cleanse → toner → snail essence → niacinamide or vitamin C → moisturiser → SPF Evening: double cleanse → toner → snail essence → retinol or other actives → moisturiser
Layers especially well with: hyaluronic acid (on damp skin first, then snail), niacinamide (snail first, niacinamide on top), centella, peptides.
Wait 10–15 min between: vitamin C (low pH conflict if applied immediately together), AHA/BHA.
Avoid same routine as: benzoyl peroxide (BP oxidises the snail proteins — use in opposite AM/PM routines).
Pairs especially well with
COSRX Centella Blemish Cream — snail soothes, centella calms — natural daily pairing for trouble-prone skin
Beauty of Joseon Dynasty Cream — snail essence layers cleanly under the rice + ceramide cream for sealed hydration
Anua Heartleaf 77 Soothing Toner — apply heartleaf first, snail essence after — daily soothing-plus-repair combo
Full ingredients
Free from
Full INCI ingredient list (manufacturer)
Snail Secretion Filtrate, Betaine, Butylene Glycol, 1,2-Hexanediol, Sodium Hyaluronate, Panthenol, Arginine, Allantoin, Ethyl Hexanediol, Sodium Polyacrylate, Carbomer, Phenoxyethanol, Adenosine, Sodium Hydroxide
What real users say
“I have been using this for 18 months. It is the one product I will not be without. My post-inflammatory hyperpigmentation faded faster than with any other product I tried.”
— Reddit r/AsianBeauty, top-voted 2024 review
“The texture takes some getting used to (it is slimy on application) but absorbs into a really cushiony, plump finish. I use it twice a day under everything.”
— LookFantastic verified review
“My dermatologist actually recommended this when I was recovering from a series of fractional laser treatments. The recovery was noticeably faster than the side I forgot to apply.”
— r/SkincareAddiction comment, 2024
Texture / feel
Slightly slimy on application — this is the high-molecular-weight glycoproteins. Absorbs within 60 seconds into a cushiony, slightly tacky finish that softens once another product layers on top. Not for those who hate sticky textures, despite the otherwise neutral feel.
Buying authentic
Verified UK retailers
Counterfeit warning
Common fakes circulate on Amazon UK marketplace sellers (not Amazon UK direct) and on unverified eBay listings. The genuine product has a holographic seal on the box and a batch code printed (not stickered) on the bottle base.
Clinical data
COSRX-funded study (2019, internal) reported 87% of users noticed improved skin texture within 4 weeks. Independent validation is limited but the underlying snail mucin literature is solid.
This page was last reviewed on 2026-05-17. We update product storytelling when formulation, retailer availability, or evidence changes meaningfully.
About this product
A cult-favourite essence packed with 96% snail mucin to hydrate, repair, and smooth skin overnight.
Best for these skin types
Concerns addressed
AHA/BHA chemical exfoliation smooths rough patches, while hyaluronic acid plumps for a refined finish.
