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However, Vitamin B12 supports normal energy metabolism, and people with low B12 levels may feel more supported after addressing a deficiency or insufficiency
Summary: Feeling worse after a B12 injection typically reflects your body adjusting to replenished vitamin levels, triggering metabolic processes that may temporarily cause fatigue, headaches, or injection site discomfort
10.1016/j.regpep.2012.12.007 9 BecejacT.CesarecV.DrmicD.HirslD.MadzaracG.DjakovicZ.et al (2018)
Discard any vial that appears cloudy or discolored, and always discard at 28 days even if the water looks clear
Side Effects Explained Vitamin B12 (cobalamin) is an essential water-soluble vitamin vital for red blood cell formation, neurological function, and DNA synthesis
