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2020;65(1):T15-33


High doses of B12, often used to treat deficiencies, may cause side effects such as headaches, nausea, diarrhea, fatigue or weakness, and tingling in the hands and feet

Stein SR, Ramelli SC, Grazioli A, Chung JY, Singh M, Yinda CK, et al

Individual results will vary.

Roblitz S, Stotzel C, Deuflhard P, et al
