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*Correspondence: Liwan Fu, [email protected] Hu, [email protected] This article was submitted to Clinical Nutrition, a section of the journal Frontiers in Nutrition Disclaimer All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers

Therefore, patients with low serum concentrations of vitamin B12 are given vitamin B12 supplements at regular intervals

Vitamin B12 Seafood like clams and crabs Beef and beef liver Nutritional yeast Fortified cereal Fortified soy products like tofu, soy milk, and tempeh Dairy products like Swiss cheese, yogurt, and milk Can Too Much Vitamin B12 Cause Heart Palpitations

Saukkonen T, Shojaee-Moradie F, Williams RM, Amin R, Yuen KC, Watts A, Acerini CL, Umpleby AM, Dunger DB