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Diaz-Vivancos et al., 2010
Where the research could go next Open scientific questions remain
Hair, skin, and nails: B12 supports cell reproduction, so hair, skin, and nail health can suffer when levels are low
It is caused by either lack of intrinsic factors or surgical removal of parts of the digestive system that bypass the small intestine
Couto, N., Wood, J., & Barber, J
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