What does this supplement support? Swanson's Niacinamide supplement is a versatile form of vitamin B3 supporting joint health, heart health, and carbohydrate metabolism to aid energy production — all with natural ingredients you can trust. How much niacinamide is in each capsule? Our cardiovascular support supplement delivers 250 mg of niacinamide in each easy-to-swallow capsule, specially created for safe and effective wellness support. Is this a natural formula? Yes — this full-spectrum formula features plant-based ingredients without unnecessary processing for a clean, pure supplement. How is this supplement made? For over 5 decades, Swanson has delivered science-backed health products worldwide. Each wellness supplement is made in GMP-certified facilities, and our purity and potency testing includes independent third-party labs. Can I trust the quality? Yes — for over 5 decades, Swanson Health has delivered science-backed health products worldwide from Fargo, ND. Our facilities are GMP certified, and clinical research, scientific consensus, and usage traditions guide our innovation. Swanson A+