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 Thiamine, Riboflavin, Niacinamide and Vitamin B-6. The two-stage, time-release technology helps to extend the availability of these vitamins to the body over a longer period of time.** Base on in-vitro dissolution tests designed to simulate the digestive process. Individual results may vary.