Under the traditional diet, after the food is digested and absorbed through the small intestine into the large intestine, the protein and fat residues are small, and these small residues can continue to synthesize essential substances such as B vitamins, vitamin K and some non-essential amino acids under the action of intestinal flora, which are all beneficial to health. However, if the intake of animal proteins and fats increases too much beyond the capacity of the small intestine to digest and absorb, what enters the large intestine will no longer be a small amount of residue. In the large intestine, the “fermenter”, too much nutrients will lead to dysbiosis, and those surplus nutrients will be synthesized into a large number of amines, amines are carcinogens. Amines, either as a liquid or as a volatile gas, are very smelly. So, some times people eat too much and too well, the intestinal tract is too heavy, and will fart. Farting is not only an embarrassment, but also a red flag. The ideal situation: If the absolute and relative proportion of dietary fiber in food is adequate, the amount of stool will appear to be very large, and may even be much larger in volume than the total volume of food consumed. Such a stool is a healthy stool, usually semi-solid, containing more than 80% of water, and carrying out more than one-third of the dry weight of the stool in intestinal waste. These people have very good bowel movements and have a very low incidence of not only colon cancer but also cardiovascular disease and diabetes. Worst case scenario: If, for example, dietary fiber intake is low, intestinal peristalsis is slow, emptying time is long, stools are dry, hard and few, and there is not enough stimulation of the rectum, less bowel movements and no desire to defecate every day. At the same time, amines and other toxic wastes in the colon are not excreted in time with the feces, and will accumulate in the body for too long, more and more, and finally have to “self-produced”: after reaching a certain concentration, through the intestinal wall into the blood, resulting in an increase in systemic toxins. As a result, constipated people tend to have dry skin and breakouts, and the cells of the colon wall, which are closest to the toxins, inevitably become inflamed and even develop cancer. Therefore, the urge to stool or fart is a protective reminder mechanism that the body requires timely detoxification. Otherwise, the rectal nerve will feel blunted by long-term fecal pressure, leading to constipation. In addition, a reasonable rest, adequate sleep is also quite important. The intestine is different from the brain, five senses and limbs, not only will not rest when the body sleeps, but will be excited, peristalsis accelerated, and secrete mucus to promote defecation, repair intestines. Therefore, people with little sleep often have problems with defecation, and the intestinal tract is not fully repaired, so the probability of cancer is also high.