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It is also fully available for the synthesis of selenium-containing enzymes, such as glutathione peroxidase

Reproducibility of the insulin tolerance test (ITT) for assessment of growth hormone and cortisol secretion in normal and hypopituitary adult men

The catch is that when you take glutathione in a regular capsule or tablet, a lot of it gets broken down in the digestive process before your body can use it.* Liposomal technology gets around this by wrapping the glutathione in tiny phospholipid particles (essentially fat-based spheres that protect it and help it pass through tissue more easily)

A study combining the effects of NAC (600 mg three times daily) and selenium in the form of sodium selenite (500 mcg daily) was designed to answer questions about the effects of these antioxidants on glutathione production, lymphocyte subsets, and viral load

More Information about repurposing drugs for use in the context of cancer in general is available at Life Extensions Drug Repurposing in Cancer protocol