Jamieson Vitamin B3 (Niacin) 500 mg improves circulation by dilating blood vessels. It supports digestive-system health and helps increase energy from carbohydrates. Vitamin B3 also maintains a healthy nervous system, reduces cholesterol and triglyceride levels, regulates blood glucose levels and maintains healthy skin. Jamieson's Vitamin B3 contains a high source of Vitamin B3 that is processed without heat and solvents to ensure its integrity and effectiveness.