Vitamin B3 (Niacin)

Vitamin B3 (Niacin) is a water-soluble vitamin essential for energy metabolism, DNA repair, and cell signaling. It is a precursor to NAD+ and NADP+, coenzymes involved in hundreds of metabolic reactions. Deficiency causes pellagra (dermatitis, diarrhea, dementia). Blood levels reflect nutritional status and adequacy for metabolic functions. This micronutrient test measures total niacin status.