He is blunt about online vendors: lots of these come from China, are fraught with heavy metals, and some have been tested to contain no actual peptide at all (source)
However, many myths about glutathione IV therapy are doing the rounds
54 HuangX.ChengZ.SuQ.ZhuX.WangQ.ChenR.et al (2012)
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Total n-3 unsaturated fatty acid levels and DHA concentrations significantly increased and total n-6 polyunsaturated fatty acids and AA levels significantly decreased in the motor cortex of the PD mice model heavily fed DHA, and both striatal dopamine levels and tyrosine hydroxylase immunoreactivity were observed to increase and increase, respectively
NFE2L2 and SLC25A39 drive cuproptosis resistance through GSH metabolism