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Vitamin B12 performs important metabolic functions in the body

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Metformin affects b12 absorption through multiple pathways including interference with calcium-dependent membrane binding in the ileum

A vegan diet is generally healthy, low in cholesterol and protective of heart disease, but its followers must take vitamin B12 supplements or risk a condition that causes permanent numbness in their hands and feet, experts say

Full disclosure: Inform your healthcare provider about any existing medical conditions, especially diabetes, thyroid issues, or a family history of medullary thyroid cancer or multiple endocrine neoplasia type 2

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