TOSOWOONG Glutathione Ampoule — Efficacy 3.1/5.0, Safety 4.6/5.0 | DemythSkin
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[ DemythSkin Verdict ]
TOSOWOONG Glutathione Ampoule
TOSOWOONG

TOSOWOONG Glutathione Ampoule

SerumBrightening
Efficacy
Basic
3.1 / 5.0
Safety
Safe
4.6 / 5.0
System Verdict
This is a bare-bones, two-true-active ampoule that leans heavily on niacinamide while the hyped glutathione is marketing noise more than proven topical effect. Efficacy is driven mainly by niacinamide in a likely meaningful concentration given its early INCI position, offering real support for brightening and barrier function, but the formula lacks supporting humectants, soothing agents, or additional evidence-backed actives that would elevate performance beyond a simple brightening serum. Glutathione at 20,000 ppm is aggressively advertised, yet topical glutathione has weak and inconsistent clinical support compared with established brightening actives, so it cannot justify a high efficacy score. The minimalist base (mostly solvent, one humectant, and a few solubilizers/polymers) keeps the product functional but not sophisticated, with no dedicated barrier lipids or anti-irritant complex to enhance tolerability or synergistic results.
Active Ingredients Detected
A Tier: Good BasicsProven Results
Niacinamide
B Tier: Supporting IngredientsPromising Ingredients
PEG-60Hydrogenated Castor OilHydroxyethyl Acrylate
C Tier: Marketing IdolsHype | Limited or Weak Data
Glutathione
What Each Ingredient Does
Water
Solvent, formula base
Butylene Glycol
Humectant and penetration enhancer
1,2-Hexanediol
Preservative and solvent
Niacinamide
Multifunctional brightening and barrier-support active
Glutathione
Antioxidant, marketed brightening agent
PEG-60
Solubilizer and emulsifier
Hydrogenated Castor Oil
Solubilizer and texture enhancer
Hydroxyethyl Acrylate
Polymer, viscosity and film former
Full Ingredient List (INCI)

Water , Butylene Glycol , 1,2-Hexanediol , Niacinamide , Glutathione(20,000Ppm) , PEG-60 , Hydrogenated Castor Oil , Hydroxyethyl Acrylate/

Frequently Asked

Is TOSOWOONG Glutathione Ampoule worth it?

TOSOWOONG Glutathione Ampoule scores 3.1 out of 5.0 for efficacy (Basic) and 4.6 out of 5.0 for safety (Safe) on DemythSkin's independent ingredient analysis. This is a bare-bones, two-true-active ampoule that leans heavily on niacinamide while the hyped glutathione is marketing noise more than proven topical effect. Efficacy is driven mainly by niacinamide in a likely meaning

What are the key active ingredients in TOSOWOONG Glutathione Ampoule?

TOSOWOONG Glutathione Ampoule contains no gold-standard actives — its formula is built on supporting and base ingredients rather than clinically transformative actives.

Does TOSOWOONG Glutathione Ampoule contain fragrance or known irritants?

DemythSkin's analysis found no flagged irritants in TOSOWOONG Glutathione Ampoule. It scores 4.6 out of 5.0 for safety.

How is TOSOWOONG Glutathione Ampoule scored?

DemythSkin grades every product on two independent axes: efficacy (whether the ingredients have clinical evidence of working) and safety (irritation and sensitisation risk). Ingredients are classified S through D against a database of over 3,000 compounds. No brand pays for a score.

Analyze on DemythSkin →

Analysis last updated: 2026-08-28. DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score.