Niacin Russell Weller Mar 13, 2023 Supplement that aids in its deficiency that leads to slow metabolism and an intolerance to the cold. It is made and used by your body to turn food into energy. Synonyms: Vitamin B3Related Articles: What is a Mito Cocktail?Vitamin B3 Has Therapeutic Effect in Progressive Muscle DiseaseFinancial Assistance for the Mito CocktailGlossary: Low plasma tyrosine