Glutathione: what it is, what it does for skin, and how to use it safely

By the GlutaNex team · Updated 11 October 2026 · 6 sources cited

What is glutathione used for?

Glutathione is the body's own antioxidant. It protects cells from oxidative stress, recycles vitamins C and E, and helps the liver process toxins. In skincare it is used in creams and face washes for brighter, more even-looking skin, alongside daily sunscreen.

It is made from three amino acids: glutamic acid, cysteine and glycine. Levels fall with age, stress, smoking and sun exposure.

What does glutathione do for the skin?

Glutathione slows tyrosinase, the enzyme that makes melanin, shifts pigment towards lighter forms and adds antioxidant protection. With regular use and sunscreen it can help tan, dullness and uneven tone look lighter over 8 to 12 weeks, but it does not change natural skin colour.

A 10-week study of a 2% glutathione lotion found a modest drop in melanin index versus placebo (Watanabe et al., 2014). More: glutathione benefits for skin.

Is glutathione permanent skin whitening?

No. Glutathione does not permanently whiten skin. Any lightening of tan or uneven tone is gradual and fades if you stop or skip sunscreen, because skin keeps making melanin. Claims of permanent whitening, especially from injections, are not supported by clinical trials.

Regulators have warned against skin-lightening injections (US FDA warning, 2015). Read glutathione for skin whitening: what is true.

What food is highest in glutathione?

Among everyday foods, spinach, avocado, asparagus and okra (bhindi) contain the most glutathione. Garlic, onion, broccoli, cabbage, eggs, lentils and dairy supply the sulphur and amino acids your body uses to make it, and vitamin C foods like amla help keep it active.

Cooking lowers glutathione in vegetables, so include some raw or lightly cooked options. Full list: glutathione-rich foods.

Glutathione is a small antioxidant molecule that your body makes every day, mostly in the liver. It is often called the body's "master antioxidant" because it helps protect cells from damage and recycles other antioxidants such as vitamin C and vitamin E. In skincare, glutathione is used in creams, serums and face washes made for brighter-looking, more even skin.

This guide covers everything in one place: what glutathione is, how it affects skin, the different forms you can buy, what the research shows, and how to use it safely.

What is glutathione?

Glutathione (often written GSH) is a tripeptide, a chain of three amino acids:

• Glutamic acid (glutamate)
• Cysteine, which carries the sulphur group that makes glutathione such an effective antioxidant
• Glycine

It exists in two forms. Reduced glutathione (GSH) is the active form that neutralises free radicals. When it does that job it becomes oxidised glutathione (GSSG), which the body then converts back. Skincare products may use either form.

Glutathione levels naturally fall with age, stress, poor sleep, smoking, alcohol and heavy sun exposure, which is one reason it has become popular in skincare.

What does glutathione do in the body?

• Antioxidant defence: it neutralises free radicals produced by everyday metabolism, UV light and pollution.
• Recycles other antioxidants: it helps regenerate vitamin C and vitamin E.
• Detoxification: the liver uses it to process and remove many substances.
• Immune support: immune cells rely on it to work properly.

How glutathione affects skin colour and tone

Skin colour comes from melanin, made in cells called melanocytes. There are two main types: dark brown-black eumelanin and lighter red-yellow pheomelanin. According to a review in the Indian Journal of Dermatology (Sonthalia, Daulatabad & Sarkar, IJDVL 2016), glutathione may influence melanin in a few ways:

1. Slowing tyrosinase, the key enzyme the skin uses to make melanin.
2. Shifting production from darker eumelanin towards lighter pheomelanin.
3. Antioxidant action, which reduces the oxidative stress that triggers extra pigment after sun exposure.

In everyday terms, this is why glutathione is used in products for tan, dullness and uneven-looking tone. It does not change your natural, genetic skin colour, and no honest product should claim it does.

Benefits of glutathione for skin

• Brighter, more even-looking skin with regular use and daily sunscreen.
• Support for fading tan and dark marks, gradually, over weeks.
• Antioxidant protection against daily stress from sun and pollution.
• Smoother, more hydrated feel, reported in the topical study below, partly thanks to the cream base itself.

Read the full guide: glutathione benefits for skin.

What the research says

Glutathione is widely used, but the number of good clinical studies is still small. Here are the main ones, in plain words:

A 2025 systematic review of topical glutathione (Khanna et al., J Clin Aesthet Dermatol 2025) concluded that it "shows promise", but that studies are few, small and short, and that more and larger trials are needed. The Indian review (Sonthalia, Daulatabad & Sarkar, IJDVL 2016) reached a similar view: the evidence is encouraging for creams and tablets in the short term, but not strong enough to call glutathione a treatment for pigmentation disorders such as melasma.

Our honest summary: glutathione can help skin look brighter and more even over time, as part of a routine with sunscreen. Expect gradual, modest change, not dramatic results.

Forms of glutathione compared

More detail: glutathione cream vs tablets vs injections.

Glutathione side effects and safety

Creams and face washes are generally well tolerated. As with any new product, some people get mild tingling, redness or dryness at first; stop if it lasts. Injections are a different matter: the US FDA warning, 2015 said injectable skin-lightening products may be unsafe and contain unknown substances, and the Indian dermatology review advises doctors not to give IV glutathione for skin lightening. Full guide: glutathione side effects and is glutathione safe for skin?

Foods that support glutathione

Your body builds glutathione from amino acids, so diet matters. Foods rich in sulphur and in glutathione's building blocks include garlic, onion, broccoli, cabbage, cauliflower, spinach, okra (bhindi), avocado, eggs, lentils and dairy. Vitamin C-rich foods such as amla, guava, oranges and lemons help keep glutathione in its active form. See glutathione-rich foods.

How to use glutathione in your routine

1. Night: cleanse with a gentle face wash such as Gluta Boost Face Wash, then apply a glutathione cream such as GlutaNex Glutathione Night Cream.
2. Morning: cleanse and apply broad-spectrum sunscreen, SPF 30 or higher.
3. Be patient: give the routine 8 to 12 weeks before judging.

Step by step: how to use glutathione cream.

Who should be careful

• Pregnant or breastfeeding women, especially with products that also contain retinol.
• People with eczema, rosacea or very sensitive skin.
• Anyone with patchy pigmentation that may be melasma, or spots that change shape or colour: see a dermatologist first.

General information about cosmetic skincare, not medical advice. Results vary from person to person. See a dermatologist for persistent or changing pigmentation.