glutathione for heart patients Glutathione deficiency and heart failure:

A 1987 study on mice determined oral glutathione to be nontoxic,27 and a 2017 toxicity study (also on mice) found that glutathione's LD (the amount of a substance needed to kill 50% of all test animals in one dose) was 5g/kg.6 An equivalent toxic dose for an 80kg human would be 32.5g, which is more than 32 times the highest amounts used in clinical studies

The most common side effects associated with glutathione injections include: Allergic Reactions Some individuals may be allergic to glutathione supplements

And so they use it for three months, six months, up to a year

For isotretinoin patients, this pharmacokinetic distinction matters