Glutathione vs Vitamin C: which is better for your skin?
How glutathione and Vitamin C compare, who each suits, and whether to use them together.
| Glutathione | Vitamin C | |
|---|---|---|
| What it is | Antioxidant tripeptide the body makes | Antioxidant vitamin (ascorbic acid and its forms) |
| Main skin use | Brighter, more even-looking tone | Brightness, antioxidant protection, firmer-looking skin |
| How it works | Slows tyrosinase; shifts melanin to lighter forms | Slows tyrosinase; neutralises free radicals; supports collagen |
| Evidence | Small studies, modest effect | Well studied in skincare |
| Best time | Night (or as directed) | Morning, under sunscreen |
| Watch out for | Mild irritation in some people | Can sting; pure forms oxidise and turn brown |
Which is better?
Neither replaces the other. Vitamin C has stronger evidence as a daytime antioxidant and brightener; glutathione is a gentle option for tan and uneven tone, often used at night. They also work together: vitamin C helps keep glutathione in its active form.
How to use both
- Morning: cleanser → vitamin C serum (optional) → sunscreen.
- Night: cleanser → glutathione cream.
GlutaNex Glutathione Night Cream already includes vitamin C alongside glutathione and niacinamide.
Frequently asked questions
Can I use glutathione and vitamin C together?
Yes. Vitamin C helps keep glutathione active. Many products combine them; if you use separate ones, vitamin C in the morning and glutathione at night is a simple split.
Is vitamin C better than glutathione for skin?
Vitamin C has more research behind it as a brightening antioxidant, while glutathione is a gentle option for tan and uneven tone. Using both often works best.
- Sonthalia S, Daulatabad D, Sarkar R. Glutathione as a skin whitening agent: facts, myths, evidence and controversies. Indian J Dermatol Venereol Leprol. 2016;82(3):262-272.
- Khanna R, Rambhia P, Chapas A. Systematic review of the efficacy and safety of topical glutathione in dermatology. J Clin Aesthet Dermatol. 2025;18(9):51-54.
General information about cosmetic skincare, not medical advice. Results vary from person to person. See a dermatologist for persistent or changing pigmentation.
More glutathione guides
Glutathione: what it is, what it does for skin, and how to use it safely
The complete guide: what glutathione is, how it affects skin, every form compared, and the research.
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How glutathione and niacinamide compare, who each suits, and whether to use them together.
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