Vitamin B3 (Niacin) Test

This blood test is used to determine Vitamin B3 (Niacin) deficiencies.
Like all B vitamins, niacin (vitamin B3, also known as nicotinic acid) plays a role in converting carbohydrates into glucose, metabolizing fats and proteins, and keeping the nervous system working properly. Niacin also helps the body make sex-related and stress-related hormones and improves circulation and cholesterol levels.
Your liver can convert tryptophan, an amino acid from high-protein foods like meats and milk, into niacin.Symptoms of mild niacin/vitamin B3 deficiency include:
IndigestionFatigueCanker soresVomitingDepressionSerious deficiency of vitamin B3 is called pellegra and can result in death. Pellegra includes more serious symptoms like:
Thick, scaly pigmented rash on skin exposed to sunlightSwollen mouth and bright red tongueVomiting and diarrheaHeadachesApathy and/or depressionFatigueDisorientationMemory lossGood sources of niacin include:
Red meatFishPoultryFortified breads and cerealsEnriched pastaPeanuts