JuneC - if you drink some water, with either vit. C or wheat grass juice mixed in, your stomach will not absorb the toxic fluids you are trying to eliminate and you will not get sick. The main job of the transverse colon is to re-absorb liquid from feces so that when it passes to the decending colon it is in a more solid form and easier for your body to eliminate. Think of it as a reclaimation project for waste water. If your stomach is busy with water and vit c the toxic water the colon re-absorbs is neutralized by the vit c neutralizes it. You can also put vit c or wheat grass juice in your colonic/enema water and it will help de-toxify the liquid. I had many colonics from a professional and we always started with a glass of vit c and water. I was never sick.