Gas is good, it indicates the presence of normal bacterial flora of the colon.

An even better method of improving colon health is eating well, with a variety of non-starch foods including leafy vegetables, wheats, lentils etc. This improves transit time and increases the bulk of faeces to reduce constipation. There is also new evidence that non-starch polysaccharides may prevent colonocytes from becoming cancerous.

If you have a history of colon cancer, you should see your gastroenterologist or proctologist.