Research confirms that intestinal flora dysbiosis is the source of all diseases, such as constipation, enteritis, ulcers, diabetes, obesity, and even tumors, etc. So what factors can lead to intestinal flora dysbiosis? 1, environmental factors Estonian children in the former Soviet period are richer in intestinal flora than Swedish children, which indicates that environmental factors will have a greater impact on the number and type of intestinal flora. Other environmental factors that destroy intestinal flora are polluted atmosphere, polluted water, heavy metal pollution such as mercury and lead emitted from house renovation, and pollutants such as formaldehyde and benzene. These factors can lead to the intestinal tract before aging. 2, diet and living habits unhealthy lifestyle, smoking, drinking, staying up late, etc.. And overeating, too much meat, too much acidic food, too much fast food convenience food, too much fried greasy food, too much cold food, etc. 3, mental factors mental stress can also disrupt the balance of intestinal flora. Such as when astronauts return to Earth from space, most of its body beneficial bacteria such as lactic acid bacteria have been mostly lost. If the work is too busy, often participate in banquets, excessive mental stress and anxiety, depression and other emotions, resulting in dysfunction of the neuroendocrine system, intestinal physiological disorders, so that the intestinal micro-ecological environment out of balance, and then cause intestinal aging. 4, trauma Surgery, trauma, infection, tumor, chemicals and disease also have an impact on the intestinal flora, especially in critically ill patients, sometimes the entire lactic acid bacteria can be lost . 5, tumor treatment Isotopes, hormones, radiation therapy and chemotherapy can reduce the immunity of the body while treating the disease, and also disrupt the balance of intestinal flora. 6, antibiotic use long-term use of a large number of broad-spectrum antibiotics, can make most of the sensitive bacteria and normal flora are inhibited or killed, and drug-resistant bacteria due to the role of antibiotic selection can be multiplied, resulting in dysbiosis, diarrhea or constipation and other symptoms. 7, constipation for the elderly, due to the gradual decline in intestinal tension and propulsion, tooth loss, chewing food, plus eating too fine, exercise and other reasons, resulting in poor digestion, peristaltic function of the gastrointestinal tract, is very easy to cause constipation, feces in the intestinal tract for too long, the ecology of the flora has changed, the proliferation of harmful bacteria and affect health.