l-carnitine dietary supplement Acetyl Solaray L-Carnitine, 500 mg -

These are the effects of L-Carnitine that have been studied and confirmed and may be in use medically

Optimal results occur with consistent use over 3-6 months, as GHs effects are cumulative and require time for tissue remodeling

Schliep KC, Mumford SL, Peterson CM, Chen Z, Johnstone EB, Sharp HT, et al

To boost glutathione levels, people may consider consuming foods rich in the amino acids required for its synthesis, such as cysteine-containing foods (e.g., garlic, onions, cruciferous vegetables) or take glutathione supplements (though the effectiveness of oral supplementation is debated)

doi:10.3389/fnins.2016.00538 [PubMed] Bergen N, Jaddoe V, Timmermans S, et al

Peptides may hold a lot of promise in anti-aging, immune function, and more