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The Cast Index

COSRX · South Korea

Advanced Snail 96 Mucin Power Essence

Skin prep · Essence · Hydrated

Lightweight barrier hydration under Couture glass skin when the face needs slip, not weight.

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Editorial skin prep still-life reference for COSRX Advanced Snail 96 Mucin Power Essence — anonymous AI-generated study, not an official packshot
Editorial AI still-life reference — not an official packshot

COSRX · Advanced Snail 96 Mucin Power Essence

The desk verdict

A lightweight hydrating essence for Couture glass skin when the face needs slip, not weight. COSRX lists 96% snail secretion filtrate with sodium hyaluronate, and positions it for all skin types including sensitive. Clinical percentages on the brand site come from a 20-person manufacturer study in Korea (May–June 2025) — useful context, not an independent Cast Index test.

Skip this if you need a vegan formula (the filtrate is snail-derived), a treatment acid, or a heavy cream. Skip also if you want this desk to certify “clinically proven glow” — those figures are brand-reported.

The short version

The short version of this review

COSRX Advanced Snail 96 Mucin Power Essence is a fragrance-free hydrating essence listed at 96% snail secretion filtrate with sodium hyaluronate. The brand positions it for all skin types, including sensitive skin, as a glass-skin prep step. Glow statistics on the official page are from a 20-adult manufacturer study in Korea in 2025, not a Cast Index test.

Product information reviewed 2026-08-13.

01 / The basics

What is Advanced Snail 96 Mucin Power Essence?

COSRX lists the essence at 96% snail secretion filtrate with sodium hyaluronate, positioned as a lightweight hydrating step for all skin types including sensitive.

Best for
Lightweight barrier-support hydration

02 / Review

What is in Advanced Snail 96 Mucin Power Essence?

COSRX builds this essence around snail secretion filtrate at a stated 96% concentration, with betaine, sodium hyaluronate, allantoin and panthenol on the published INCI. The brand’s own comparison table claims a much higher mucin percentage than a “typical essence.” That is marketing context, not a Cast Index assay of competing bottles.

Texture is described as lightweight and fast-absorbing — the reason it sits in a glass-skin kit rather than as a night cream. COSRX states the harvest does not harm snails; the formula is still animal-derived, so it is not vegan. Anyone buying for a vegan brief should stop here.

03 / Review

Who is Advanced Snail 96 Mucin Power Essence best for?

The official page targets sensitive skin, post-breakout marks, dryness and early dullness. The desk uses a narrower brief: a hydrating layer that will not fight a sheer, light-catching base. It is not an AHA, not a retinol, and not a spot treatment.

Brand-reported results include a large moisture increase after one use and a 35% glow / 80% redness-reduction figure from the 20-person 2025 study. Those numbers describe that manufacturer test. They are not a promise for every face, and they are not medical claims about barrier disease.

04 / Review

Why is Advanced Snail 96 Mucin Power Essence in the Beauty Desk edit?

Couture glass skin fails when prep is either too matte or too greasy. This essence is the slip layer: hydration that can sit under SPF and a radiant base without adding mask weight. New York Post Most Wanted 2024 is press recognition cited by the brand — not a Cast Index award.

Amazon UK/US search links are live for this SKU because it is widely sold there. Shopping links do not change the ranking of finishes or whether the product stays in the archive.

05 / How to use it

How should you use Advanced Snail 96 Mucin Power Essence?

  1. 01After cleansing and toning, apply a small amount to the face
  2. 02Pat with fingertips until absorbed
  3. 03Follow with moisturiser, then SPF in the morning, then makeup if needed
  4. 04Patch test if you have a history of reacting to snail mucin or the published INCI

06 / How it compares

How does Advanced Snail 96 Mucin Power Essence compare?

RoleCOSRX Snail 96 EssenceOrdinary HA 2% + B5Anua Heartleaf 77 Toner
JobLightweight mucin hydrationMulti-weight HA + ceramidesSoothing toner water
Hero materialSnail secretion filtrate 96%Hyaluronic acid + ceramidesHeartleaf extract
Vegan?No — snail-derivedCheck current INCICheck current INCI
Glass-skin useSlip under baseHydration before makeupCalm prep

07 / Quick facts

What should you know before choosing Advanced Snail 96 Mucin Power Essence?

  • Key ingredient: 96.3% snail secretion filtrate and 1,000 ppm sodium hyaluronate, per COSRX’s product fact pack
  • Sizes listed: 30mL, 50mL and 100mL; US official 100mL was $25 when checked 13 August 2026
  • Fragrance-free; the brand says it is suitable for all skin types including sensitive — not vegan (snail-derived)
  • Brand-reported study: Dermacosmetic Skin Science Laboratory, Korea, 26 May–10 June 2025, 20 adults — glow, redness and moisture figures on the site are manufacturer results
  • How to use (brand): after cleanse and tone, pat a small amount over the face, then moisturiser
  • Serves Couture glass skin as a lightweight hydration layer under base

Further reading on The Cast Index

Facts on this page are drawn from the brand’s own product information and named, reputable press coverage, summarised in our own words. Inclusion in the Beauty Desk edit is editorial and independent of any commercial relationship. Last reviewed 2026-08-13. Corrections: desk@thecastindex.com.

FAQ

Advanced Snail 96 Mucin Power Essence, answered

What is Advanced Snail 96 Mucin Power Essence by COSRX?

Advanced Snail 96 Mucin Power Essence is a essence from COSRX, formulated for lightweight barrier-support hydration. COSRX lists the essence at 96% snail secretion filtrate with sodium hyaluronate, positioned as a lightweight hydrating step for all skin types including sensitive.

Is COSRX Advanced Snail 96 Mucin Power Essence vegan?

No. It contains snail secretion filtrate. COSRX describes an ethical collection process, but the ingredient is animal-derived.

Can I use COSRX Snail 96 under makeup?

Yes. COSRX positions the essence as a fast-absorbing hydrating base under makeup or sunscreen. That is brand usage guidance, not a wear test by this desk.

Are the glow and redness percentages independently verified?

No. COSRX attributes those figures to a 20-adult study at Dermacosmetic Skin Science Laboratory in Korea from 26 May to 10 June 2025. Treat them as brand-reported.

What finish does COSRX Snail 96 serve on The Cast Index?

Couture glass skin — a lightweight hydration step so a radiant base can sit on plump-looking skin without cream weight.

Is COSRX Snail 96 a treatment for acne?

No. The brand mentions post-breakout marks and sensitive skin as use cases. This desk does not treat the essence as medicine.

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Also reviewed by the desk

Back to the Season Beauty Index, the Seoul desk, or read how the desk selects and verifies products.