Now Foods Niacin 500 mg, 250 tabs, Pack of 2

Nutritional HealthSustained Release to Minimize FlushingA Dietary SupplementVegetarian/VeganKosherVitaminsFamily Owned Since 1968GMP Quality AssuredNiacin supplements may sometimes temporarily cause flushing and/or itching, but this sustained release tablet should minimize those symptoms. To further limit these uncomfortable but not dangerous symptoms, take daily and avoid missing doses.

Now Foods Niacin 500 mg, 250 tabs, Pack of 2