conditions associated with low glutathione Treatments 101: Part 1 — The Mother of All Antioxidants Glutathione Metabolism - an overview

Two or more is worth a pediatrician visit, especially if your child also faints during exercise, has a family history of cardiac problems, or faints without warning

However, as our understanding of cell signaling and regulatory pathways has developed, so has the involvement of GSH homeostasis in many other key processes, including regulation of cell proliferation and apoptosis and post-transcriptional modification of proteins through S-glutathionylation

doi: 10.3390/ijms232012655, 66 MullerK

And they make a lot of money doing it

A Fund's shares will change in value, and you could lose money by investing in a Fund