mayo clinic glutathione Glutathione: Benefits and Supplements Now Foods Glutathione Skin Brightener
Description
Thymosin Alpha-1 is a naturally occurring peptide originally found in the thymus gland
2011;64:78-83.e72
As an antioxidant, it reduces oxidative stress, brightens the skin complexion with its detoxification and reduces skin inflammation

Or, more specifically, how one of these enzymes starts to fail with age or persistent illness