What is the recommended dosage for Glutathione?

General: 250-1,000 mg/day; Skin Lightening: 500-1,000 mg/day

What are the side effects of Glutathione?

Potential side effects include: Generally well-tolerated, Mild bloating or gastrointestinal discomfort, Rare skin rash.

What is glutathione and how may it support skin health?

Glutathione is the body's master antioxidant, playing roles in detoxification and melanin regulation. It shifts melanin production toward lighter pheomelanin rather than darker eumelanin. Clinical trials, particularly from East Asia, show oral and sublingual glutathione may reduce melanin index and improve skin brightness.

What dosage of glutathione has been studied for skin lightening?

Clinical trials have used 250–500 mg of oral glutathione per day for 4–12 weeks. Both reduced (GSH) and oxidized (GSSG) forms have been studied. A Thai RCT showed significant skin lightening with 500 mg GSH daily for 12 weeks. Liposomal and sublingual forms may improve bioavailability.

What are the potential side effects of glutathione supplements?

Oral glutathione is generally well tolerated. Mild side effects include bloating and abdominal discomfort. Long-term safety at supplemental doses is not well established. IV glutathione (used off-label for skin lightening in some countries) carries additional risks and is not FDA-approved for this purpose. Zinc supplementation may support endogenous glutathione.

Glutathione

antioxidant

Also known as: GSH, Reduced Glutathione, L-Glutathione, Liposomal Glutathione, S-Acetyl Glutathione

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About

Glutathione is a tripeptide (glutamate-cysteine-glycine) serving as the body's master antioxidant. It inhibits tyrosinase and shifts melanogenesis from eumelanin (dark) to pheomelanin (light). A 2023 systematic review found oral glutathione (250-1,000 mg/day) may reduce melanin index in multiple RCTs, primarily in Asian populations.

How It Works

Tripeptide (glutamate-cysteine-glycine) serving as the body's master antioxidant; inhibits tyrosinase and shifts melanogenesis from eumelanin (dark) to pheomelanin (light); detoxifies reactive oxygen species and supports vitamin C and E recycling.

Evidence For Conditions

Condition	Grade	Studies	Participants
Hyperpigmentation	C	6	350	View →

Side Effects

Generally well-tolerated
Mild bloating or gastrointestinal discomfort
Rare skin rash

Drug & Supplement Interactions

Chemotherapy agents (may interfere — consult oncologist)
Acetaminophen (glutathione is involved in its detoxification)

Always inform your healthcare provider about all supplements you take.

Related Ingredients

Alpha-Lipoic Acid Astaxanthin CoQ10 Resveratrol

Quick Facts

Dosage: General: 250-1,000 mg/day; Skin_Lightening: 500-1,000 mg/day
Forms: capsule sublingual liposomal liquid IV (clinical setting)
Natural Sources: Asparagus, Avocado, Spinach, Okra, Cruciferous vegetables, Garlic
Upper Limit: Not established; generally well-tolerated up to 1,000 mg/day
Best Time: On an empty stomach for better absorption; liposomal forms have improved bioavailability

Evidence Summary

Hyperpigmentation C

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.