Depletion of zinc also reduces the volume of semen produced
Mast cell activation syndrome, or MCAS, is an immunological condition where the mast cells in the body release excessive amounts of chemical mediators such as histamine, leading to symptoms such as hives, flushing, rashes, swelling, low blood pressure, dizziness, brain fog, breathing difficulties, and even anaphylaxis
Furthermore, the more of these receptors you have in your muscle cells, the more testosterone can bind to them, stimulating muscle mass growth and strength
However, there is currently very little direct evidence on this (further discussion here)
Int J Sport Nutr 5:S120S131
On safety: research on oral and topical glutathione has generally reported a favourable safety profile, with occasional mild effects like bloating or loose stools