Yogurt is a rich source of probiotics.
Probiotics refer to a kind of intestinal physiological bacteria beneficial to human life and health, such as Bifidobacterium, Lactobacillus acidophilus, Lactobacillus casei and other lactic acid bacteria. At present, there are many kinds of yogurt products on the market, including solidified yogurt, stirred yogurt and juice yogurt with different juices, which are sweet and sour and suitable for different tastes. No matter what kind of yogurt it is, it is characterized by containing lactic acid bacteria. These lactic acid bacteria will secrete substances beneficial to human health when they propagate in the human intestine, so yogurt has more benefits to the human body:
First, it can decompose lactose and protein in milk, which is more easily digested and absorbed by the human body;
Second, yogurt can promote the secretion of gastric juice, increase appetite and strengthen digestion;
Third, lactic acid bacteria can reduce the production of some carcinogens, so they have anti-cancer effects;
Fourth, it can inhibit the reproduction of spoilage bacteria in the intestine and weaken the toxins produced by spoilage bacteria in the intestine;
Fifth, it has the function of lowering cholesterol, especially suitable for people with hyperlipidemia.
Sixthly, generally speaking, patients take or inject a lot of antibiotics to treat diseases or prevent infection, which makes the intestinal flora change greatly, and even some beneficial intestinal bacteria are suppressed or killed, resulting in flora imbalance. Yogurt contains a lot of lactic acid bacteria. Drinking 0.25-0.5 kg per day can maintain the normal intestinal flora balance and adjust the beneficial intestinal flora to a normal level. Therefore, people who have recovered from a serious illness drink more yogurt, which has an irreplaceable role in physical recovery. Therefore, it is also what people who have not recovered from a long illness need most.
In general, the content of lactic acid bacteria in yogurt is around 106, which means that the total content of probiotics in yogurt is no less than some similar health foods. Lactic acid bacteria intestinal scavenger can settle in the intestine, which can make beneficial changes in the composition of intestinal flora, promote the secretion of digestive enzymes in the body and intestinal peristalsis, remove intestinal garbage and inhibit the reproduction of spoilage bacteria.
Health care function of yogurt
Yogurt is not only nutritious, but also contains lactic acid bacteria, so it has health care function. These functions are:
1. Maintain the ecological balance of intestinal flora, form a biological barrier, and inhibit harmful bacteria from invading the intestine.
2. Prevent constipation by producing a large number of short-chain fatty acids to promote intestinal peristalsis and a large number of bacteria to grow and change osmotic pressure.
3. Yogurt contains a variety of enzymes to promote digestion and absorption.
4. By inhibiting the growth of saprophytic bacteria in the intestine and the toxins produced by corruption, the liver and brain can be protected from these toxins and aging can be prevented.
5. By inhibiting the growth of saprophytic bacteria and some bacteria in the intestine. So as to inhibit carcinogens produced by these bacteria and achieve the purpose of preventing cancer.
6. Improve human immune function. Lactic acid bacteria can produce some substances that enhance immune function, which can improve human immunity and prevent diseases.
Yogurt is a long-lived drink.
According to Nobel Prize winner and Russian food expert Mechnikov (1845- 19 16), the earliest research results of yogurt prove that yogurt contains a growth active factor, which can enhance the body's immune function and is beneficial to health, disease resistance and anti-aging. There are many longevity places in the world, and residents have the habit of drinking yogurt for a long time. Some studies believe that Bulgarians live longer because they drink more yogurt, while the average height of Japanese people increases because they often drink yogurt. According to the research results of scholars, the reasons why yogurt is beneficial to human health and longevity may include:
1. Yogurt can enhance human immune function;
2. Reduce serum cholesterol level. Experiments have proved that even without any drugs. Drink about 24 grams of yogurt every meal, and cholesterol can be reduced after one week.
3. Regular consumption of yogurt can promote intestinal movement, shorten the transit time of food from mouth to anus, soften the contents of colon by glycolysis, increase the amount of fecal excretion, prevent constipation, and help prevent colon cancer. So yogurt is called "longevity food" abroad.
Yogurt is different from yogurt drinks.
At present, some manufacturers in the market sell "milk-containing drinks" under the banner of "yogurt", deliberately confusing these two different product concepts. Some manufacturers of milk-containing beverages began to play "edge ball" on product names, and marked vague product names such as "yogurt", "yogurt" and "yogurt" in big letters on product packaging. If you look closely, you will find that there are several other key small words beside them-"milk drink", "drink" and "drink".
It is understood that "yogurt" and "milk-containing beverage" are two different concepts. In terms of ingredients, "yogurt" is made of pure milk by fermentation, which belongs to the category of pure milk, and its protein content is ≥ 2.9%, among which the protein content of flavor yogurt is ≥ 2.3%. Milk-containing beverage only contains 1/3 fresh milk, water, sweetener and fruity agent. Therefore, the content of protein is less than 1%, and its nutritional value is different from that of yogurt, so it can't be used to replace milk or yogurt at all.
There are two kinds of milk-containing drinks: blended drinks with protein content not less than 1.0% and fermented drinks with protein content not less than 0.7%, which are different from real yogurt or milk. According to the protein content on the packaging label, they can be distinguished as yogurt or milk.
In the fourth quarter of 200/kloc-0, Guangzhou Municipal Bureau of Quality and Technical Supervision conducted a spot check on 15 kinds of yogurt products produced by various enterprises, and only two kinds of yogurt were genuine: "Fengxing" brand 150g/ cup partially skimmed yogurt produced by Guangzhou Dairy Company, and "Danone" brand 150g/ cup whole yogurt produced by Guangzhou Dairy Company. The protein content of the remaining 13 portion is only about 1%, which can't meet the minimum requirement of protein content of yogurt, and the nutritional effect of yogurt can't be achieved after drinking, so it can only be called "milk-containing beverage" or "lactic acid bacteria beverage".
Who should drink yogurt best?
Most of the sugar contained in milk is lactose. However, due to the lack of lactase in the digestive juice of some adults, the digestion, absorption and utilization of lactose are affected, resulting in stomach discomfort and even diarrhea after drinking milk, which is called "lactose intolerance". This is why many people don't drink milk. At this time, you can choose yogurt instead of milk, and don't worry about lactose. Yogurt contains lactic acid bacteria; Lactose in milk can be converted into lactic acid by lactic acid bacteria fermentation, and lactose intolerant people will not have diarrhea symptoms when drinking yogurt, which just solves the problems that some people may have when drinking milk. But it is worth noting that many yogurt drinks (not yogurt) are made of milk, water and sour agents. Such products may also contain lactic acid, which may also lead to symptoms of lactose intolerance.
1, patients with arteriosclerosis and hypertension
Some nutritionists have found that yogurt contains a "milk factor", which can lower the serum cholesterol in the human body. Calcium lactate in yogurt is easily absorbed by human body. Some people have done experiments, drinking 720 grams of yogurt every day can significantly reduce serum cholesterol after one week.
2. Cancer patients
Lactobacillus bifidus in yogurt produces acetic acid, lactic acid and formic acid during fermentation, which can inhibit nitrate-reducing bacteria and block the formation of carcinogenic nitrosamines, thus playing a role in preventing cancer. Some countries with developed dairy industry in Europe believe that "a cup of yogurt a day keeps women from worrying about breast cancer".
3. Old and frail patients
Lactic acid bacteria in yogurt can decompose lactose in milk to form lactic acid, make intestines acidic, inhibit spoilage bacteria that grow and reproduce in neutral or alkaline environment, and synthesize nutrients such as vitamin B, folic acid, vitamin E, etc., which are rich in protein and vitamin A itself, and are very beneficial to the elderly and infirm.
4, the use of antibiotics
Antibiotics control pathogenic bacteria and inhibit non-pathogenic bacteria, which can lead to loss of appetite, nausea and vomiting, dizziness and so on. And even lead to another infectious disease. Yogurt contains active Mycobacterium longum, which can restore the imbalance of gastrointestinal flora.
5. Patients with osteoporosis
Yogurt contains calcium lactate which is easily absorbed by people. This will increase patients' calcium, which is beneficial to the prevention and treatment of osteoporosis.
Problems needing attention in drinking yogurt
Differentiate varieties
At present, there are many kinds of "milk yogurt" made of milk or milk powder, sugar, lactic acid or citric acid, malic acid, spices, preservatives, etc., which do not have the health care function of yogurt, so we should carefully identify them when buying.
Yogurt can't be heated to drink.
Once yogurt is heated, it will kill a large number of active lactic acid bacteria, which will not only lose its nutritional value and health care function, but also change the physical properties of yogurt, form precipitation and lose its unique taste. Therefore, drinking yogurt can't be heated. You can buy it in summer and put it at room temperature for a certain time before drinking it in winter.
Don't drink yogurt on an empty stomach.
It is best not to eat yogurt when you are hungry, because the acidity in the stomach is high (PH 2) on an empty stomach, lactic acid bacteria are easily killed by gastric acid, and the health care function is weakened. About 2 hours after a meal, the gastric juice is diluted, and the PH value in the stomach (PH value rises to 3~5) is most suitable for the growth of lactic acid bacteria (pH value suitable for the growth of lactic acid bacteria is above 5.4). Therefore, this time is the best time to drink yogurt.
Should not be taken with antibiotics.
Antibiotics such as chloramphenicol and erythromycin and sulfonamides can kill or destroy lactic acid bacteria in yogurt, making it lose its health care function. But this does not affect the content and digestion and absorption of nutrients in yogurt.
Rinse your mouth immediately after drinking.
With the development of yogurt and lactic acid series drinks, the rate of dental caries in children is also increasing, which is related to the corrosive effect of lactic acid on teeth. Therefore, rinse your mouth in time after drinking yogurt, or it is best to use a straw to reduce the chance of lactic acid contacting your teeth.
Yogurt needs refrigeration.
Yogurt needs to be refrigerated at 4℃. During storage, the acidity will continue to increase, making yogurt more acidic. If the storage conditions are good, yogurt will not go bad, otherwise it will breed bacteria, yeast or Bacillus and make it go bad. This kind of yogurt can't be eaten. When you buy yogurt in hot summer, you must see if the milk seller has a freezer, otherwise the quality of yogurt will be difficult to guarantee.
Comparison between yogurt and milk
First of all, yogurt is more nutritious than milk.
Yogurt is fermented from pure milk. Lactic acid bacteria can not only retain all the nutrients of fresh milk, but also produce various vitamins necessary for human nutrition during fermentation, such as vitamin B 1, vitamin B2, vitamin B6, vitamin B 12, etc.
Yogurt is also a good source of calcium. Although the nutritional content of yogurt depends on the source and composition of raw milk, generally speaking, the composition of yogurt is higher than that of raw milk, on the one hand, because the quality of raw materials is high, on the other hand, because some yogurt is made with a small amount of milk powder. So generally speaking, drinking a cup of yogurt15og can meet 1/3 of the daily calcium required by children under 0/0 and 1/5 of the calcium required by adults.
Second, yogurt is easier to absorb than milk.
Flour fermented into steamed bread is easy to digest and absorb, and milk fermented into yogurt has the same effect. About 20% of sugar and protein in milk are broken down into small molecules, such as galactose and lactic acid, small peptide chains and amino acids.
The fat content in milk is generally 3% ~ 5%. After fermentation, the fatty acids in milk can be increased by 2 times compared with raw milk. These changes make yogurt easier to digest and absorb, and the utilization rate of various nutrients is also improved. Especially for people with lactose indigestion, eating yogurt will not cause abdominal distension, flatulence and diarrhea.
Fresh milk is rich in calcium, and minerals such as calcium will not change after fermentation, but lactic acid produced after fermentation can effectively improve the utilization rate of calcium and phosphorus, so calcium and phosphorus in yogurt are more easily absorbed by human body.