Best Naturals Niacinamide (Vitamin B3) Pure Powder comes in a 1-pound container and provides a clean, unflavored source of this essential B vitamin in powder form. Niacinamide, a non-flushing form of Vitamin B3, is ideal for customizable supplementation. This product is Non-GMO, Gluten-Free, and third-party lab tested for purity and quality. It is manufactured in the USA in a GMP-compliant, FDA-registered facility, with no artificial colors, flavors, sweeteners, preservatives, or common allergens.