selenium is part of the glutathione peroxidase enzyme system Simplified catalytic mechanism peroxidase: in the Enzyme‐Inspired Single Selenium Site for
Description
Side effects are typically manageable by this phase because your body has been adapting for 12+ weeks

Hypoxia represents a hallmark of pathological conditions, including tumors, infections, ischemia-reperfusion injury (IRI) and inflammation (36)

Kirkeby A, Main H, Carpenter M
Lets deal with the simpler one firstthe presence of cysteine

If that is your main goal, you may also want to explore the Healthy Aging Supplements collection
