Satisfaction guaranteed or your money back. As a water-soluble nutrient, Vitamin C helps fight cell-damaging free radicals in the body. Free radicals can contribute to oxidative stress, which in turn may contribute to the premature aging of cells.Vitamin C also promotes immune system function. C-Time with Rose Hips is specially formulated to provide a gradual release of Vitamin C over a prolonged period of time. Adults can take one tablet daily.