C is one of the water soluble vitamins, which is why it is quickly eliminated. The way around this is to take what is called “Liposomal” Vitamin C, which is fat soluble. Not only is it retained much longer, but it also penetrates the cell wall better. It can be purchased online.
I was taking liposomal vitamin c because I thought the same way. I was listening to Dr. Marik and Dr. Kory of FLCCC fame and during the Q&A section of this week’s podcast/video, one of them said liposomal isn’t more effective….as the lipid shell gets broken down in the gut and that limits uptake just like normal oral vitamin c.
I haven’t researched it yet but Dr. Marik would know his vitamin C since he pioneered using IV vitamin c for the treatment of sepsis.