Compounded Glutathione

Glutathione is not an FDA-approved drug. It appears on FDA's list of bulk substances under evaluation for compounding (Category 1), which allows licensed pharmacies to compound it while FDA completes its review. Human outcome data is limited.

Glutathione is a tripeptide — glutamate, cysteine and glycine — and the most abundant antioxidant your cells make. It neutralises reactive oxygen species directly, acts as the cofactor for the glutathione peroxidase enzymes that clear peroxides, and is what the liver attaches to drugs and toxins to make them water-soluble for excretion. Once oxidised it is recycled by glutathione reductase using NADPH, so a cell's supply is a cycle rather than a stock. Levels fall with age, illness and sustained oxidative stress. Swallowed glutathione is largely broken down in the gut, which is why pharmacies compound it as a nasal spray or an injection instead. The pharmacy that fills this prescription prepares a nasal spray, used daily, in most states, and a weekly injection in Alaska, Arkansas, Indiana, Minnesota, New Jersey, North Carolina, South Carolina, Virginia and West Virginia. What either does to the level inside your cells — where the work happens — is not well measured in people: cells normally build their own from cysteine rather than importing it. The biochemistry is textbook; the human outcome data is limited, and your provider will describe it that way.

1. 01

   Weeks 1–2

   With the injection, site soreness is the common early experience, and nausea, cramps or a flushed feeling can follow a dose given too quickly. With the nasal spray, tell the care team about nasal irritation, wheezing or chest tightness. Fever or chills within minutes of a dose are not normal — stop and contact the care team the same day.

2. 02

   Months 1–3

   Where you and your provider decide whether it's earning its place. There is no published marker that tells you it is working; the assessment is honest and clinical.

3. 03

   Ongoing

   Reviewed at check-ins like any prescription — dose, frequency and whether to continue at all.

With injections, site pain or redness, nausea, abdominal cramps, flushing and headache are the reported ones, generally mild; with the nasal spray, report nasal irritation or any change in your breathing. Allergic reactions are uncommon but possible. The serious risk in the public record is contamination rather than the molecule: in 2026 FDA described at least 30 patients with fever, chills, pain and shock-like reactions after intravenous glutathione made from a dietary-supplement-grade powder, which is why the compounding pharmacy's sourcing and endotoxin testing matter as much as the prescription. Long-term safety of repeated injections has not been established.

• Forman HJ, Zhang H, Rinna A. Glutathione: overview of its protective roles, measurement, and biosynthesis. Molecular Aspects of Medicine, 2009;30:1–12
• FDA, 'FDA reminds compounders not to use dietary supplement grade glutathione for injectables', 2026-08-27 — at least 30 patients harmed after intravenous glutathione compounded from a dietary-supplement-grade lot (Medisca lot 229536); two Texas pharmacies recalled for elevated endotoxin

Complete safety information is provided during your visit and with every prescription. This page is a summary, not a substitute for your provider's advice.