Based on this study, it appears that taking either sublingual GSH or NAC can help improve your glutathione levels
Lysine acetylation is an important post-translational modification that modulates heat shock response in the sea cucumber Apostichopus japonicus
T., & Ghezzi, P
Branched-chain amino acids (BCAAs) in isolation are similarly insulinogenic
doi: 10.1371/journal.pone.0042529 Summary Keywords cytokine - immunological terms, type 2 diabetes, mycobacteria, oxidative stress, host directed therapy, immune responses Citation To K, Cao R, Yegiazaryan A, Owens J, Nguyen T, Sasaninia K, Vaughn C, Singh M, Truong E, Medina A, Avitia E, Villegas J, Pham C, Sathananthan A and Venketaraman V (2021) Effects of Oral Liposomal Glutathione in Altering the Immune Responses Against Mycobacterium tuberculosis and the Mycobacterium bovis BCG Strain in Individuals With Type 2 Diabetes
Timing Follow-up Marker A1c Why it matters Reviews longer-term glucose control because tesamorelin can affect glucose tolerance