The practice of natural colon cleansing dates back to ancient Greece. In the U.S., cleansing the colon — the large intestine — became popular in the 1920s and 1930s. But when the theories behind it lost support, it fell out of favor. Recently, though, colon cleansing — using, for example, teas, enzymes, or colon irrigation — has experienced resurgence.Is colon cleansing good for you? The jury is still out. That is because researchers have devoted little study to colon cleansing. For now, here is some information that might help you decide whether colon cleansing is for you.