Dietary supplement. One per day. SuperTwin is the most comprehensive, high potency, one per day, sustained release multi vitamin and mineral tablet on the market today. SuperTwin is a revolutionary new concept in multi vitamin and mineral supplementation. Each tablet is composed of one layer of fat soluble vitamins as well as sustained release water soluble vitamins, and another layer of rapid release minerals. The water soluble vitamins are released over a prolonged period of time through the passage in the gastrointestinal tract (digestive tract) for optimum absorption. SuperTwin bi-layer tablets eliminate the interaction between incompatible nutrients for maximum stability and quality. Free of sugars, salt (sodium chloride), artificial colors, flavors or preservatives. Free of yeast, wheat, milk and egg. Packaged in a glass bottle for maximum stability, quality and freshness.