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Glutathione in skincare: what it does and how to use it

Glutathione is an antioxidant that skincare uses for a brighter, more radiant-looking complexion. It's popular in Korean skincare, where you'll find it in serums and masks. Used every day with sunscreen, and often paired with alpha-arbutin for dark spots, it helps skin look more even and less dull over a few weeks.

yeolim Glow Toning Nutrition Serum, made with glutathione, among lab glassware in warm light.

What glutathione is

Glutathione is a small molecule made of three amino acids (glutamine, cysteine and glycine). Your body makes it naturally, and it's one of the main antioxidants in your cells. In skincare, it's added to leave-on products like serums and masks.

What it does in skincare

Antioxidant support: helps defend skin against everyday stress that can make it look dull.
A brighter, more radiant look: the main reason it's in Korean "glow" products.
Works well with other brightening ingredients, such as vitamin C, niacinamide and alpha-arbutin.

Results build over weeks of daily use, not overnight.

Glutathione and alpha-arbutin: why they pair well

Alpha-arbutin is a form of arbutin, an ingredient first found in bearberry plants. In skincare it helps fade the look of dark spots and post-blemish marks.
Glutathione adds antioxidant support and an overall brighter, more radiant look.

Together they cover two sides of uneven tone: specific dark spots and overall dullness. Both are gentle enough for daily use, morning and night.

How to use glutathione

Choose a leave-on product, like a serum or a leave-on mask, so it stays on skin.
Apply after cleansing (and mist or toner), before moisturizer.
Use it morning and night.
Wear sunscreen every morning. It protects the progress you make on dark spots.
Be patient: give it at least 4 weeks.

What to pair it with (and what to space out)

Pairs well: vitamin C, niacinamide, alpha-arbutin, hyaluronic acid.
Space out if your skin is sensitive: strong exfoliating acids and retinoids. Use those at night and glutathione in the morning, or alternate nights.
New to it? Patch-test on a small area for a few days first.

Glow Toning Nutrition Serum 30 ml bottle on white

Our glutathione products

Glow Toning Nutrition Serum (30 ml): glutathione and alpha-arbutin together, with the 12 Vitamin Complex (eleven vitamins plus Niacinamide) and a stable form of vitamin C. It absorbs fast, so it doubles as a primer. In a 4-week human application test, the look of dark spots was visibly reduced by 25.54%.*
Glow Nutrition All-Day Mask (80 ml): High-Purity Glutathione and Niacinamide in a leave-on gel with melting Vitamin C Capsules. In a 4-week human application test, skin looked 26.65% more radiant.**

Both are vegan (registered with The Vegan Society) and made in Korea. Also on Amazon US.

* 4-week human application test, Dermacle, Dec 11, 2025 – Jan 9, 2026, 20 women. Look of dark spots measured by skin imaging. Individual results may vary.

** Skin radiance human application test, Dermacle, Dec 16, 2025 – Jan 14, 2026 (251216-RN1-S04), 22 women aged 20–60. Individual results may vary.

Shop the Toning Serum · $19.99

FAQ

What does glutathione do for skin?

In skincare, glutathione is an antioxidant used for a brighter, more radiant-looking complexion. It works best in a leave-on product used daily.

Can I use glutathione with vitamin C?

Yes. They're often combined. Many glutathione serums, including ours, already contain a form of vitamin C.

Can I use glutathione and alpha-arbutin together?

Yes. Alpha-arbutin helps fade the look of dark spots, and glutathione adds an overall brighter look. They're commonly in the same serum.

How long does glutathione take to work?

Plan on at least 4 weeks of daily use, with sunscreen every morning.

Is glutathione OK for sensitive skin?

It's generally gentle, but patch-test any new product first and add one new product at a time.

Updated November 2026 · yeolim, Korean vitamin skincare