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Tag Archives: Black Tongue

Vitamin B3 (Niacin) Deficiency

What Is Vitamin B3 (Niacin)? Niacin is an essential water-soluble B vitamin that is required by all cells of the body. During digestion of food containing it, niacin (the form in food) is changed in the small intestines to the active form niacinamide (niacin ...

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