This product is formulated using a two-stage, timed-release technology. The two-stage ingredients are designed to release half of the ingredients rapidly and the other half gradually over a period of up to 8 hours. The two-stage ingredients include Vitamin C, Thiamine, Riboflavin, Niacinamide and Vitamin B-6. The two-stage, timed-release technology helps to extend the availability of these vitamins to the body over a longer period of time. Solaray With so much choice in todays herbal supplements market, its important to know exactly what youre buying. So Solaray go to great lengths to keep their products simple, natural, ethical and affordable. Solaray products are 100% natural. All the raw materials are tested for authenticity, potency, purity and safety. Plus, the final products undergo random sample testing to give you complete confidence. This product is formulated using a two-stage, timed-release technology. The two-stage ingredients are designed to release half of the ingredients rapidly and the other half gradually over a period of up to 8 hours.