They also help fight infections, improve skin health, and manage blood sugar levels
If your B12 is really low, it might take a few more days before the tiredness fades away
Journal of Biological Chemistry, 275(38), 29318-29323
Most of the evidence giving rise to this claim comes from a few observational studies
This placebo-controlled study showed that Glutathione supplementation protects the body from chemotherapeutic toxicity and improves quality of life, function, and general well-being in cancer patients
With the exception of this, a tumorigenic effect has only been shown in the past in an animal experiment with rats (EFSA, 2006)