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What is a niacin deficiency?

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Niacin deficiency is when you don't get enough or can't absorb niacin or its amino acid precursor, tryptophan. Also known as vitamin B3 or nicotinic acid, niacin is one of eight B vitamins.

From: Niacin Deficiency WebMD Medical Reference

SOURCES: MedlinePlus: "Pellagra." University of Maryland Medical Center: "Vitamin B3 (Niacin)." University of Florida Institute of Food and Agricultural Sciences Extension: "Facts about Niacin."Oregon State University Linus Pauling Institute: "Niacin." MedlinePlus: "Niacin (vitamin B3, nicotinic acid), Niacinamide."



Merck Manual: "Niacin"

Reviewed by Christine Mikstas on May 29, 2019

SOURCES: MedlinePlus: "Pellagra." University of Maryland Medical Center: "Vitamin B3 (Niacin)." University of Florida Institute of Food and Agricultural Sciences Extension: "Facts about Niacin."Oregon State University Linus Pauling Institute: "Niacin." MedlinePlus: "Niacin (vitamin B3, nicotinic acid), Niacinamide."



Merck Manual: "Niacin"

Reviewed by Christine Mikstas on May 29, 2019

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What are symptoms of mild niacin deficiency?

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