It is widely studied in preclinical models for its role in cellular signaling, angiogenesis, and tissue-specific biological responses
Minor side effects can include: morning grogginess (if the dose was a bit too high or too late at night), vivid dreams, or a headache
doi: 10.3803/EnM.2022.1642
45 In vivo administration of GSH has been demonstrated to enhance the activation of cytotoxic T-cells, but depletion of GSH intracellularly inhibited the activation of lymphocytes, increased susceptibilities of human lymphoid cells to radiation, and suppressed cell-mediated cytotoxic functions, suggesting that intracellular GSH can modulate the function of immune cells
10.1089/ars.2011.4005 116 LoboV.PatilA.PhatakA.ChandraN
Yes, B-12 is water-soluble, and any excess is naturally eliminated by the body