glutathione and n acetylcysteine N-Acetylcysteine Its Immunomodulatory Properties in Humans and Domesticated Animals Top 9 Benefits of NAC
Description
2002;367(Pt 3):72940

Most of them can better their athletic performance and appearance
Vitamins D3 and K2 are a particularly well-studied combination D3 supports calcium absorption, while K2 directs that calcium appropriately to bones rather than soft tissues

The idea that you could harness this signaling machinery and point it at specific problems is scientifically compelling