Ultra Two Light Time Release by Nature"s Plus 30 Sustained Release Tablet The increasing demand for a high-potency multiple vitamin with lower potencies of vitamins A and D has prompted us to develop Ultra-Two Light Sustained Release in a special base which provides for the gradual release of ingredients over a prolonged period of time. In a nutrient-rich base of chlorophyll enzymes carotenoids nucleic acids vitamins minerals and trace minerals from more than 20 whole foods.