Vitamin B12 supplementation is beneficial for those with deficiencies, but its effects on the general population are unclear. It is essential for DNA synthesis, red blood cell formation, and nervous system function. Individuals following vegan diets or with certain health conditions may be at higher risk for deficiency. Evidence on the benefits of vitamin B12 supplementation is mixed, with some studies showing no impact on cognitive function, depression, or infant neurodevelopment. Vitamin B12 is safe at any dose, as there is no tolerable upper intake level. It is important for health care providers and consumers to educate themselves on the benefits and risks of vitamin B12 supplementation.
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The science behind vitamin B12
