Glutathione is commonly available as: Reduced glutathione is an active form of glutathione and can effectively neutralize free radicals in the body
The effect of milk thistle, green tea, and cinnamon beverages on liver enzymes of operating room anesthesia personnel Sedlak T.W., et al
In addition, individuals who may be vitamin K deficient due to liver failure, those with a propensity to bleed (e.g., bleeding peptic ulcers), and those with inherited bleeding disorders (e.g., hemophilia) or a history of hemorrhagic stroke, should not take -tocopherol supplements without close medical supervision because of the increased risk of hemorrhage (119, 128)
Not just this supplement but all the ones he offers
A small pilot study published in the European Journal of Clinical Nutrition gave healthy adults 500mg or 1000mg of oral liposomal glutathione daily for a month and measured meaningful jumps in natural killer cell activity and lymphocyte proliferation within two weeks, alongside up to a 40% rise in whole-blood glutathione (Sinha et al., 2018)