NSF GMP CERTIFIED: Bestvite’s facility is NSF/ANSI 455-2 Dietary Supplements Good Manufacturing Practice (GMP) certified. Earning GMP certification from NSF verifies that a manufacturing facility has the proper methods, equipment, facilities, and controls in place to produce dietary supplement products. BESTVITE QUALITY: All Bestvite products are manufactured in the USA according to GMP. The raw materials and all batches of the finished Vitamin D3 product are tested for purity and potency. PURE FORMULA: Bestvite Vitamin D3 contains no stearates, is non-GMO, gluten-free, and comes free of any unwanted ingredients. Each capsule contains 2,000 IU of Vitamin D3. IMMUNE SUPPORT: Vitamin D3 is an essential nutrient for immune support that can support a healthy lifestyle.*. SUNSHINE VITAMIN: Vitamin D3, also known as cholecalciferol, is a type of Vitamin D that is naturally formed through exposure to sunshine. It plays a crucial role in calcium and phosphate levels in the body, which are important for bone support.*.