ergothioneine and glutathione in mushrooms Isotope-labeled clarifies the mechanism of reaction with singlet oxygen Mushroom marvels: understanding their role
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These effects are not well-established in controlled human trials and should be considered speculative at this stage

doi: 10.1002/adhm.202001812 63 ChristianDA

It is found in human plasma, saliva, and urine, where it forms a natural part of the way your body functions

Accordingly, Harris et al
