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Whether youre a good candidate for vitamin B12 shots depends on several factors

Vitamin B12 shots may not be suitable for people with a history of: sensitivity to vitamin B12 Lebers disease, which affects the optic nerve kidney problems hypokalemia (low potassium levels) deficiencies in other nutrients, particularly folic acid and iron Vitamin B12 injections typically begin to work straight away

While some places might market it for general energy boosts or weight loss, if your B12 levels are already normal, there's little scientific proof that these injections will give you a significant energy rush or help you lose weight

Scand J Haematol 1982;29:311-318 Pezacka E, Green R, Jacobsen DW

Metabolic improvements extend beyond weight loss