The damage of glutathione injections appears in the event of excessive intake without consulting a specialized plastic surgeon, as it may lead to whitening of hair and eyelashes, as well as kidney failure, and it may lead to chronic skin sensitivity
To put that in perspective, you'd need massive amounts of oral supplements to come close to these therapeutic doses - and most wouldn't make it to your cells intact
doi: 10.1172/JCI175031 106 Van TrimpontMSchalkAMHofkensKPeetersETSasSVandemeulebroeckeKet al
However, the administered NA dose was based on efficiency in hypercholesterolemia studies, therefore, an optimal NA dose for mitochondrial myopathy has to be determined, especially considering that another study found an association between metabolites of excess NA, 2PY, and 4PY, and cardiovascular disease (CVD) 245