Vitamin C with rose hips Vitamin C with rose hips as sustained release tablets This pure vitamin C is made from corn. * Sustained Release (SR) means delayed release, ie a special foundation guarantees the gradual release of vitamin C over a longer period of time. This ensures for 40% better absorption and utilization. Vitamin C is considered the most important water-soluble antioxidant. Since it cannot be produced by itself, it has to be supplied via food or food supplements. Nature's Plus products are 100% natural. With quality guarantees from independent laboratories. Recommended use: Take 1 tablet daily.