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Niacin / Vitamin B3 Fact Sheet

By , About.com Guide

Updated December 30, 2009

About.com Health's Disease and Condition content is reviewed by the Medical Review Board

Functions:
  • energy metabolism
  • healthy skin, digestive system and nervous system
Sources:
  • meat
  • milk
  • eggs
  • poultry
  • fish
  • whole grains
  • enriched bread and cereal
  • nuts
Deficiency (Not enough):
  • weakness
  • dizziness
  • loss of appetite
  • confusion
  • diarrhea
  • rash
Toxicity (Too much):
  • swollen tongue
  • rash
  • low blood pressure
  • nausea / vomiting / diarrhea
Daily Allowances:
  • 100mg
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