side effects of vitamin b12 injection from too much What Are B12 Injections? Uses,
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MCAS, liver function, and a few other possibilities deserve a workup

This, in turn, boosts metabolic rate and activates a gene known as sirtuin-1 (SIRT1), also referred to as the "longevity gene." SIRT1 is involved in reducing the risk of various conditions such as diabetes, obesity, metabolic syndrome, atherosclerosis, cardiovascular disease, kidney disease, liver disease, neurodegeneration, and cancer.

Yu H, Zhou X, Wang Y, Huang X, Yang J, Zeng J, Li G, Xie X, Zhang J (2020) Nicotinamide N -methyltransferase inhibits autophagy induced by oxidative stress through suppressing the AMPK pathway in breast cancer cells

GLP-1 drugs work through appetite suppression

Drug information is subject to change and may not cover all uses, directions, precautions, warnings, interactions, reactions, or adverse effects

Based on studies involving individuals, it appears 1 mg of cyanocobalamin via injection does not create any notable side effects