Glutathione dosage and evidence

What is Glutathione?

How does Glutathione work?

It mops up harmful oxygen molecules, the kind that damage cells, both on its own and through an enzyme called glutathione peroxidase. It recharges other antioxidants. It also latches onto toxins so enzymes called glutathione S-transferases can clear them from the body.

What do people who took Glutathione report?

This is what real people say happened to them, good and bad. Nobody measured it. A report cannot tell a real effect from the lift people get just from expecting it to work, from a diet or training change made at the same time, or from what was really in the vial. We still put it near the top. It is the next best thing to a study in people: what happens when real people use it, including what goes wrong.

• Two separate conversations run under one name. One is about injection, usually into a muscle or into a vein, in the several hundred milligram range, and the other is about whether swallowing it accomplishes anything at all.
• The oral absorption argument is the most persistent strand. People split between those saying it is broken down before reaching anywhere useful, those pointing to work suggesting oral absorption was underestimated, and those recommending precursors such as N-acetylcysteine instead. Liposomal preparations are the usual compromise proposed.
• Reports of no observable effect appear plainly, including from people who used it for a stretch.
• Where something is reported it is described vaguely, in terms of skin appearance or swelling and soreness settling down, and at least one such account was offered by its author as possibly nothing more than expectation.
• Negatives described are irritation, soreness and bruising at the injection site, and a recurring warning against people putting it into their own veins. A shot into the muscle is the advice instead.
• Cost and access drive the discussion as much as effect does. The injectable form is described as expensive next to oral, and the continued availability of compounded product is treated as precarious.

Sources: ExcelMale threads on compounded glutathione injections and oral supplementation, plus LongeCity supplement and ageing threads, found by site-restricted search, September 2026. Nothing above is attributed to any specific post and no post is reproduced.

The evidence, in charts

The studies we cite

• Study in people2015
  Randomized controlled trial of oral glutathione supplementation on body stores of glutathione

  Swallowing glutathione does raise the amount your body carries, but only while you keep taking it. Fifty-four adults took one of two daily doses for six months. Blood levels rose by between a sixth and a third, and a marker of oxidative stress improved. Once they stopped, levels drifted back to where they started. So this shows the supplement reaches the body. It does not show that anybody felt better or got healthier, because nothing about health was measured.

  Six-month RCT in 54 adults: oral GSH (250 or 1,000 mg/day) raised blood and erythrocyte glutathione 17 to 35% and lowered oxidized-to-reduced GSH ratio; levels returned to baseline after washout.

  PMID 24791752 European Journal of Nutrition
• Study in people2018
  Oral supplementation with liposomal glutathione elevates body stores of glutathione and markers of immune function

  A first small look at a liposomal version, not an answer. Twelve adults took it for one month. Whole blood glutathione rose by up to two fifths and some oxidative stress markers improved. Here is the problem. Everybody got the supplement, so there was nothing to compare against and no way to know what would have happened anyway. Twelve people is also too few to rule out chance. Treat this as a starting point that a proper trial has not yet followed up.

  One-month pilot in 12 adults: liposomal GSH raised whole-blood GSH up to 40% and reduced oxidative-stress markers; small, uncontrolled, preliminary.

  PMID 28853742 European Journal of Clinical Nutrition
• Review of studies2026
  FDA reminds compounders not to use dietary supplement grade glutathione for injectables

  The FDA warns that glutathione shots are not an approved drug. It linked at least 30 cases of harm to compounded glutathione drips, including fever, chills, shock-like symptoms and hospital stays. The drips were made from supplement-grade powder tainted with bacterial toxins.

  Injectable glutathione is not an approved drug; FDA linked at least 30 adverse events (fever, chills, shock-like symptoms, hospitalizations) to endotoxin-contaminated compounded IV glutathione made from supplement-grade material.

  Source U.S. FDA (Human Drug Compounding)