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As with any injection, theres a small risk of soreness at the injection site, but serious side effects are extremely rare
It works through a unique mechanism involving the activation of two different types of receptors in the body: the glucagon-like peptide-1 (GLP-1) receptor and the glucose-dependent insulinotropic polypeptide (GIP) receptor
Formulation matters too
Intramuscular B12 shots can sting quite a bit, which is unfortunate, because it discourages some people from self-injecting
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