Nerve damage happens when the provider places the needle incorrectly or at an inappropriate angle, causing numbness, tingling, or pain
Anesth Prog 38 Berlin R, Berlin H, Brante G, Pilbrant (1978) Vitamin B12 body stores during oral and parenteral treatment of pernicious anaemia
I.et al (2022a)
High dose: one dose, one capsule, Glutathione Cysteine & C from Life Extension contains 500 mg vitamin C, 50 mg L-glutathione (reduced) and 200 mg L-cysteine hydrochloride, which you can feed your body daily Good compatibility: Life Extension Glutathione Cysteine & C is characterised by good bioavailability and is suitable for a vegan diet High quality: Life Extension glutathione capsules are tested in independent laboratories for quality and purity Without undesirable additives: Cysteine capsules from Life Extension are gluten-free and made without genetic engineering Important nutrients: Glutathione Cysteine & C from Life Extension contains 500 mg vitamin C, 50 mg L-glutathione (reduced) and 200 mg L-cysteine hydrochloride
Therefore, extrapolation from in vitro potency to clinical efficacy must be interpreted cautiously