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Low vitamin B12 levels can cause tingling in your hands and feet, difficulties with mental function, and fatigue

As such, even though the FDA has not approved its use, we can assume that some adults are already taking it

According to the American Academy of Dermatology, about 14 million adults in the United States are affected, roughly 1 in 10 people

In low-resource nations, iron, folate, vitamin A, and iodine are in scant supply and their deficiency during pregnancy can contribute to multiple adverse outcomes in the mother and newborn

When B12 deficiency impairs DNA synthesis, the rapidly dividing epithelial cells cannot regenerate effectively, leading to mucosal thinning, increased fragility, and susceptibility to ulceration