Pyridinecarboxylic acid, often referred to as nicotinic acid, is a chemical compound with various synonyms in the scientific community. Synonyms for this compound include niacin, pyridine-3-carboxylic acid, and vitamin B3. Niacin is an essential nutrient that plays a crucial role in the metabolism of carbohydrates, fats, and proteins. In the body, this acid is converted into coenzymes that are involved in numerous enzymatic reactions. Commonly found in foods such as poultry, fish, and grains, pyridinecarboxylic acid is also available as a dietary supplement. It is important to maintain a balanced intake of this compound to support overall health and well-being.