how many times can a glutathione molecule be recycled The antioxidant effect of is briefly outlined in Figure Metabolic pathways of glutathione synthesis,
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& Andexter, J
Nutrients, 13 (2), 395
In short, it seems that only vitamin D supplementation decreases the risk of developing respiratory tract infections, which are a major trigger of asthma exacerbations
This suggests an extremely wide safety margin, at least in animal models
