Glutathione
Glutathione is a natural antioxidant tripeptide sold as an oral supplement. Evidence for health or skin benefits is limited, and IV or injectable glutathione is not an approved product.
What it is
A three-amino-acid peptide the body makes to neutralize free radicals.
What the evidence shows
In people
Small trials show oral forms can raise blood levels; evidence for clinical benefits is limited.
In animals and labs
Extensive lab research on its antioxidant role.
Legal status
Legal as an oral supplement. Injectable and IV products are not FDA-approved drugs.
Dosing
Follow the product label
Supplements and skincare products are used as directed on their label. Choose products with third-party testing, and check with a clinician if you are pregnant, nursing, or take medication.
Known risks
- Generally well tolerated orally
- IV use carries infection and contamination risk