Investigation of niacin on parameters of metabolism in a physiologic dose: randomized, double-blind clinical trial with three different dosages

Int J Food Sci Nutr. 2009;60 Suppl 5:192-202. doi: 10.1080/09637480902980149. Epub 2009 Jun 10.


The aim of this double-blind, placebo-controlled cross-over design trial was to assess the safety of a multi-vitamin preparation containing nicotinic acid in a physiological dose. Seventy-two healthy volunteers took part in this trial. At six consecutive time-points, we systematically documented blood pressure, pulse, skin temperature and flushing symptoms after an oral dose of up to 50.1 mg nicotinic acid. The results suggest that nicotinic acid in a dosage of 16.7 mg does not cause flushing symptoms. In higher doses up to 50.1 mg, flushing symptoms are sporadically possible. There was no physiologically relevant change regarding the central metabolic parameters blood pressure, pulse and skin temperature.

Publication types

  • Clinical Trial
  • Randomized Controlled Trial

MeSH terms

  • Adult
  • Blood Pressure
  • Body Mass Index
  • Cross-Over Studies
  • Diet
  • Dietary Supplements / adverse effects*
  • Double-Blind Method
  • Female
  • Flushing / blood
  • Flushing / chemically induced*
  • Humans
  • Male
  • Middle Aged
  • Niacin / administration & dosage
  • Niacin / adverse effects*
  • Niacinamide / adverse effects
  • Pulse
  • Skin Temperature
  • Surveys and Questionnaires
  • Time Factors
  • Vitamins / administration & dosage
  • Young Adult


  • Vitamins
  • Niacinamide
  • Niacin