There are two types of yogurt: stirred yogurt and solidified yogurt. There is a slight difference in taste (solidified yogurt tastes more sour), but there is no difference in nutritional value. From raw materials and additives, yogurt can be divided into three types: pure yogurt, flavored yogurt and fruit yogurt. Pure yogurt is fermented only with milk or reconstituted milk as raw materials; Adding auxiliary materials such as sugar, flavoring agent or natural fruit material to milk or reconstituted milk is fermented into flavored yogurt or fruit material yogurt. At present, flavored yogurt and fruit yogurt are the main products. From the point of fat content, there are full-fat yogurt, low-fat yogurt and skim yogurt. Efficacy 1. Relieve milk discomfort: Some people will have gastrointestinal discomfort symptoms such as abdominal pain, abdominal distension and diarrhea after drinking fresh milk. This is because lactase in this part of the human body is insufficient or lacking. After drinking milk, because lactose in milk cannot be digested and absorbed, it is often fermented by bacteria in the colon to produce gas, which leads to abdominal flatulence, abdominal pain and diarrhea. 1/3 of lactose in fermented milk is converted into lactic acid and other substances, which reduces the lactose content and can greatly alleviate lactose intolerance of these people, thus increasing the number of people who eat milk. 2, antibacterial whole intestine, maintain balance: the bacteria in the human intestine are called intestinal flora, which is divided into beneficial bacteria and harmful bacteria. Under normal circumstances, beneficial bacteria are dominant to make the intestinal flora in a balanced state, and harmful bacteria are morbid when they are dominant. Lactic acid in yogurt can not only reduce the PH value of intestinal contents, make the intestinal tract in a weak acidic environment, but also produce antibacterial substances, inhibit the reproduction and growth of spoilage bacteria in the intestinal tract (antagonistic to pathogenic bacteria, such as typhoid Bacillus, paratyphoid Bacillus, Salmonella, Escherichia coli, etc.), thus reducing the generation of harmful substances, maintaining the balance of intestinal flora, and having a health care effect on the human body. There is a 71-year-old man in Henan who has had his stomach removed by 2/3 and weighs only 71 kilograms. After drinking Prince's yogurt for two months, his appetite improved and his weight increased by more than 11 kilograms. He has been drinking yogurt for more than three years. 3, reduce cholesterol and blood ammonia: yogurt not only has low cholesterol content, but also contains a substance that can inhibit the synthesis of cholesterol in the liver, so eating yogurt regularly can reduce blood cholesterol content. It is reported that the cholesterol content in serum can be degraded by 5%-11% after one week for each person to eat 211 ml of yogurt, which may be due to the fact that lactic acid bacteria can inhibit the activity of hydroxymethylglutaric acid coenzyme A reductase; In addition, the whey acid produced in fermentation can also play a role in lowering cholesterol. 4, improve constipation: regular drinking of yogurt, lactic acid bacteria proliferate in the intestine, so that the water content in the feces increases, and organic acids such as lactic acid and acetic acid produced during metabolism have a stimulating effect on the intestine, which can accelerate intestinal peristalsis and is very beneficial to improve senile constipation caused by functional decline in the elderly. 5. Immunity: Studies have shown that there are three kinds of enzymes in the intestine: β-glucurolase, azo reductase and nitro reductase, any of which can transform a series of substances into carcinogens. If the activities of these three enzymes can be reduced, the chances of tumor cell formation will be greatly reduced. Scientists have made many experiments on people, rats, pigs, etc., all of which prove that the activities of these three enzymes will be greatly reduced after drinking yogurt. Macrophages in the body can inhibit the growth of tumor cells. Experts' research has proved that eating lactic acid bacteria can activate macrophages in animals, thus playing a certain immune role. Yogurt can enhance human immune function. Regular consumption of yogurt can promote intestinal movement, shorten the time of food mouth-to-anus transport, soften and ferment colon contents, increase fecal excretion, prevent constipation and prevent colon cancer. Therefore, yogurt is known as longevity food abroad. Drinking before going to bed is the most standard. It is forbidden to drink yogurt on an empty stomach. DaD$M Why not drink yogurt on an empty stomach? This is because the PH value of human gastric juice is usually between 1 and 3, and the pH value of fasting is below 2, while the pH value of active lactic acid bacteria in yogurt is above 5.4. If you drink yogurt on an empty stomach, lactic acid bacteria will be easily killed by gastric acid, and its nutritional value and health care function will be greatly reduced. If you drink yogurt after a meal, the gastric juice will be diluted and the pH value will rise to 3-5. This environment is very suitable for the growth of lactic acid bacteria, especially if you drink yogurt within 2 hours after a meal, the effect is the best. Yogurt can't be heated. Once the yogurt is cooked and heated, a large number of active lactic acid bacteria will be killed, and its physical properties will also change, resulting in separation and precipitation, and the unique taste and taste of yogurt will disappear. The most valuable thing in yogurt is the lactic acid bacteria, which can not only decompose lactose in milk to produce lactic acid, increase the acidity of intestinal tract, but also inhibit the growth of spoilage bacteria and weaken the toxin produced by spoilage bacteria in intestinal tract. If yogurt is heated, the lactic acid bacteria in yogurt will be killed, and its nutritional value and health care function will be reduced. Therefore, drinking yogurt cannot be heated, so it is advisable to buy it now in summer and drink it at room temperature in winter. Rinse your mouth with boiled water after drinking. 2 Some strains and acidic substances in yogurt are harmful to your teeth. For children, if they don't gargle after drinking yogurt, they are particularly prone to dental caries. You can't take medicine with yogurt. Taking medicine with yogurt instead of boiling water is an incorrect habit and should be corrected. In particular, you can't take chloramphenicol and erythromycin with yogurt. Antibiotics such as sulfanilamide and some drugs for diarrhea, because these drugs will also destroy or kill lactic acid bacteria in yogurt.