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Intramuscular B12 shots can sting quite a bit, which is unfortunate, because it discourages some people from self-injecting
It is not approved for human or veterinary use by the FDA or any regulatory authority
It combines with selenium to form selenocysteine , a key thyroid antioxidant, 7 and supports production of glutathione peroxidase
Because NAD+ is involved in nearly all cellular functions, many individuals may benefit from an NAD+ boost, depending on their needs and wellness goals
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