Oh yes. I think vitamin C is important. I know that the body needs vit C; but that is not enough. I think 4 hours is a good amount of time. If I were using Miracle-Mineral-Supplement for a real serious disease, I would avoid C. I think I'm well on the way to recovery from my fungus/candida infection. I've been using Miracle-Mineral-Supplement for nearly 3 months pretty strongly. It is important to take antioxidants as well. Since I take Miracle-Mineral-Supplement twice a day, maybe 6 hours would be better. I just think that MMS has already made it to the bloodstream and throughout the body by 4 hours. I don't take much more than 1000mg anyway; but I do eat apples, oranges, and grapefruits.