Some people are very leery about putting unnatural products into their bodies with good reason. Not all colon cleansers are beneficial. Some can do more harm than good. There are some foods that can work as natural colon cleansers. Vegetables, fruits, beans, nuts, seeds, and whole grains are all great sources of fiber and therefore are great for the colon. A diet high in fiber works as a broom for the digestive system, sweeping out any food clinging there. This also helps prevent constipation and keep your bowel movements regular. Green foods that are high in chlorophyll, like alfalfa, wheatgrass, and barley are also great for soothing the digestive tract. Never underestimate the power of drinking lots of water. This is the most natural form of colon cleansing of all.