Pure Affinity's Nicotinamide/ Niacinamide is manufactured in a GMP Facility right here in the United States. We have multiple levels of Quality control to make sure that you are receiving only the finest products. Nicotinamide is a flush free form of Niacin that can be found in many foods, but many people don't get enough of it in their diet. Try it with our exciting new Antioxidant, Pterostilbene. These two powerhouses support your immune system too!