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Bioalmanac

Glutathione

GSH · Reduced glutathione · L-glutathione

Early human trials

Status reviewed 18 Aug 2026

The body's main antioxidant, and a poor drug. The FDA has warned specifically against the injectable skin-lightening use. That is what most of it is sold for.

Storage

Freeze-dried powder
Refrigerated at 2–8 °C, protected from light. Glutathione oxidises readily on exposure to air.
After mixing
Use promptly. The reduced form oxidises in solution, and the oxidised form is not what is wanted.
Long-term, frozen
Unopened powder is stable at −20 °C or colder.

Dose ranges reported in sources

Descriptions of what sources report, not recommendations.

GoalRangeFrequencySource
Doses used in clinics600000–2400000 mcgOne to three times weeklyCommunity practice
Parkinson's disease trials1400000 mcgThree times weekly by infusionClinical trial

When to stop

  • Any allergic response: rash, hives, facial swelling or difficulty breathing. Seek urgent care.
  • Fever, chills, or an infusion site that becomes hot or starts spreading. Possible infection. Seek urgent care.
  • Uneven or patchy loss of skin pigment.
  • Abdominal pain or persistent nausea.

Not approved as a medicine for skin lightening or antioxidant use in the United States or the European Union. The FDA has issued a specific warning about injectable skin-lightening products containing glutathione — citing unapproved status — unknown safety and contamination risk. Oral glutathione is sold as a dietary supplement.

Arithmetic on values you enter. Not medical advice. Not reviewed by a clinician. · bioalmanac.com/peptides/glutathione

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