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The body tolerates high doses of B12 but taking too much over time may cause many unexplained symptoms

Li X, Liu Y, Yao H, et al
Proprotein convertase subtilisin/kexin type 9 (PCSK9): a potential multifaceted player in cancer

Glucose-dependent granule docking limits insulin secretion and is decreased in human type 2 diabetes

Enhancing Red Blood Cell Production: Vitamin B12 is pivotal for the production of red blood cells

B12 is also important for carbohydrate metabolism
