i have b12 injections but still tired Feel All the Time. Do I Need a Shot?: Shawn Veiseh, M.D.: Family Medicine From Fatigue to Fabulous: How

Incorporate sources of vitamin B12 into your diet, such as meat, dairy, eggs, and fortified foods, to maintain optimal levels

Andersson, Emmanuel Shapira, Biochemical and clinical response to hydroxocobalamin versus cyanocobalamin treatment in patients with methylmalonic acidemia and homocystinuria (cblC), The Journal of Pediatrics, Volume 132, Issue 1, January 1998, Pages 121-124, ISSN 0022-3476, Gimsing P, Hippe E, Helleberg-Rasmussen I, et al

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Annals of clinical and laboratory science, 45(4), 426432

B12 is vital in converting carbohydrates into glucose, which the body uses for energy