Under the normal circumstances, the process of metabolism can be finished in 12 to 24 hours when the wastes of the foods are finally discharged from the human body. Thus, the wastes can not stay in the human body too long. If the wastes stay in intestinal tract for a long time, they can be absorbed again by the human body and synthesized into toxins to cause poisoning inside the human body. Although the human body can prevent the formation of poisoning to some degree, other factors like fatigue and nervousness can affect the normal functions of the human body to cause the imbalance of internal secretion. If these toxins can enter the various human organs by the blood circulation, they can cause various diseases, such as constipation, endocrine disorders and obesity.

The first kind of toxin which can seriously endanger the human health is free radicals. Free radicals in a right amount can protect the body from being hurt by chemical substances or some other harmful materials. However, excessive free radicals can form strong oxidation and further hurt the body cells to cause aging, allergy and cardiovascular diseases. is the second kind of toxin to endanger the human health. Cholesterol is a kind of essential substance inside the human body. Most of cholesterol is produced by the liver. Cholesterol is a kind of important raw material to be used to synthesize many other important materials. However, the long-term high intake of cholesterol can increase the serum cholesterol and raise the risks of getting cardiovascular diseases. The third kind of toxin is . If people are always tired, the symptoms like fatigue and hypodynamia can be caused. These symptoms are just caused by lactic acid. Lactic acid can be accumulated with gluconic acid inside the human body to cause the blood acidic. is the fourth kind of toxin to hurt the human health. Uric acid is one of products of metabolism. It is mainly discharged by kidney. If the concentration of uric acid is higher than the normal standard, uric acid will be accumulated in soft issues or joints to cause acute inflammation.

Generally speaking, the toxins can be removed by the human body, and the key is to maintain the balance of metabolism. In order to maintain the normal metabolism, people should increase the intake of the foods which can effectively discharge the toxins from the human body in everyday life.