Cholesterol is absorbed in the upper part of the small intestine. Unabsorbed cholesterol is reduced to steroids by bacteria in the lower part of the small intestine and in the colon and excreted in the feces. Esterified cholesterol must be hydrolyzed to free cholesterol in the intestinal lumen by the action of cholesterol esterases of the digestive juices, which in turn form mixed microcolloids that are absorbed in the upper part of the small intestine. The absorption of cholesterol is affected by many factors, such as bile acid salts and dietary fats that promote the absorption of cholesterol, while plant sterols, cellulose, and fruit acids are detrimental to the absorption of cholesterol. High cholesterol is not good for your health, but too low cholesterol can affect your health as well. If cholesterol is too low, it will often lead to a decrease in the synthesis of corticosteroids, which will lead to a weakening of the stress capacity, weakening of immunity, so that the normal resistance to disease, or lead to a decrease in the synthesis of normal sex hormones, affecting the normal sexual function, both are not conducive to the health of the human body. If there is any discomfort, it is recommended to consult a doctor in time.