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How to choose out of date yogurt

The quality guarantee period of yoghurt is very important. Do you really choose yoghurt? Yoghurt is rich in nutrition, rich in calcium, and easier to absorb than milk. It is a necessary healthy drink for daily life. Adults and children like it very much. When choosing yoghurt, you must pay attention to the following questions.

1. The shelf life of 14 days is better than that of 21 days

Due to its own characteristics, the shelf life of yoghurt is shorter than that of normal milk. The shelf life of yoghurt is 2 weeks (14 days) in the environment of 0 ℃ - 4 ℃. The shelf life of some yoghourt shows that it should be noticed in 21 days. The manufacturer will generally complete it in two ways after 7 days' extension. One is to add preservatives to extend the shelf life, the other is to disinfect it in ultra-high temperature. Under this condition, the protein in milk will be lost, so the nutritional value will be reduced.

Therefore, in the selection of yogurt, the best choice of shelf life within 14 days is appropriate.

2. The more probiotics there are, the better

Generally speaking, the more probiotics are added to yogurt, the better. Most of them are 2 kinds, while some of them are 3 kinds. At the same price, 3 kinds are better.

3. The older probiotics are, the better

The older the generation of probiotics, the better. For example, the first generation of probiotics is more active and healthy than the new probiotics inoculated ten times.


1. What are the advantages of yogurt compared with milk?

A: the raw materials of yoghurt are milk, sucrose and lactobacillus starter. Yogurt not only preserves all the nutrients in milk, but also because of fermentation, which nutrients are more easily digested and absorbed by human body, so it plays a better role in promoting growth and improving nutrition than milk.

2. Does yogurt have calcium supplement effect?

A: Lactobacillus decomposes lactose in milk into lactic acid, which reduces the content of lactose, but retains other nutrients in milk, so yogurt still has the effect of calcium supplement. In fact, the absorption rate of calcium in yoghurt is not lower than that in milk, because lactic acid can promote the absorption of calcium and other minerals. In addition, there are peptide substances such as CPP produced by protein decomposition in yoghurt, which can also promote the absorption of calcium.

3. Drink milk diarrhea, can you drink yogurt?

A: Lactose in milk is the 'killer' of diarrhea caused by drinking milk. In the process of yoghurt fermentation, lactose is partially transformed into lactic acid and other organic acids, reducing the problem of lactose intolerance; Lactobacillus itself will produce a large number of 'lactase' to help the human body digest lactose. Therefore, even people who drink milk diarrhea can drink yogurt.

4. The more sour the yogurt, the better the nutrition?

A: the source of acidity of yoghurt is the lactic acid produced by lactose metabolism of Lactobacillus, which is related to the strain of starter and fermentation time and other factors. Among the Lactobacillus bulgaricus and Streptococcus thermophilus that must be used to make yoghurt, if the bacterium is dominant, the acidity will be strong, but this does not mean that the quality of yoghurt is better.

5. Is the nutritional value of fruit yoghurt better?

A: many of the ingredients of fruit yogurt come from jam. And jam after high-temperature cooking, has been unable to compete with the nutritional value of fresh fruit. Even with genuine fruit, the yogurt's shelf life is 21 days, and the fruit grain that has been released for three weeks will be discounted. The rich flavor may come from fruit flavors.


6. Is thickener in yoghurt harmful to human body?

A: most yoghourt contains thickeners. There are many kinds of thickeners, including modified starch, pectin, xanthan gum, edible gelatin, etc., which can not be digested and absorbed by human body. They are insoluble dietary fiber. They are not only non-toxic and harmless, and will not cause 'blood viscosity'. They are also conducive to postprandial rising speed of blood glucose and blood lipid, which are beneficial ingredients for prevention of chronic diseases 。 Generally speaking, the safety of thickener is very high, so there is no limit to its use amount in many foods, and the use amount in yoghurt also conforms to the use standard of food additives.

7. After putting it in the refrigerator, there is light yellow water on the surface of the yogurt. Can you still drink it?

A: these pale yellow water is "whey". When making cheese, casein, which accounts for 80% of milk protein, will form a freeze or clot, while a small amount of other protein will flow out with the whey. If you don't add thickener when making yoghurt, after a period of time, some whey will also be separated out. Such yoghurt can be safely drunk. Whey protein added in whey protein powder products and other foods is extracted from this liquid.


8. How much yogurt is suitable to drink every day?

A: the Nutrition Society recommends 300 grams of milk per day, which is about one cup of disposable paper cup, plus a small box of yogurt (about 100 grams). It is recommended that adults drink no more than 400g of yoghurt, except for pregnant women, lactating mothers or adolescents during development. In principle, milk and yoghurt can be replaced in equal amount. For teenagers, one cup of yoghurt in the morning and evening, or one cup of milk in the morning and one cup of yoghurt in the evening are ideal.

9. When is it better to drink yogurt?

A: there is no time limit. Avoid drinking before meals if you have too much stomach acid; drink yogurt on an empty stomach to promote defecation, suitable for constipation, not for diarrhea; others can drink before and after meals. But don't add another big bottle of yogurt after a big dinner, because it adds extra energy. If you want to drink yogurt after dinner, you should reduce dinner accordingly, otherwise it will lead to obesity.

10. Can yogurt be heated in microwave oven?

A: if the stomach can't accept cold drinks, you can use microwave oven to heat the yogurt, but you need to pay attention to the choice of medium-sized firepower, which can be heated to room temperature (25 ℃) in about half a minute. If the heating time is too long or the firepower is too large, in addition to continuing to kill the lactobacillus, it will also make the yogurt thinner and the taste worse. The heated yoghurt should be drunk as soon as possible to avoid long-term deterioration.


11. Can diabetic drink yoghurt?

A: research shows that drinking yogurt is good for preventing diabetes. Diabetes patients can drink half a jin of sugar free yoghurt every day, and worry about blood fat can drink low-fat yoghurt. Yogurt is rich in calcium, which can regulate the balance of calcium ions in the calcium pool inside and outside the islet beta; cells and ensure the normal release of insulin. In addition, the blood glucose response of yoghurt is relatively low. Eating it with cereal food can reduce the blood glucose response of mixed food, which is conducive to the control of blood glucose.

12. Is yogurt suitable for hypertensive patients and cerebral infarction patients?

A: research at home and abroad shows that moderate intake of dairy products is conducive to the prevention and control of hypertension, and low-fat dairy products and fermented dairy products are conducive to the prevention and control of stroke. In fact, yogurt has a more positive health effect than milk. Even if no living bacteria can reach the large intestine, the nutrients in it are also very useful for controlling blood pressure. People with arteriosclerosis and high blood pressure are all suitable to drink yogurt.

13. Can you drink yogurt during the medication?

A: most relevant scholars think that taking antibiotics will cause intestinal flora disorder and reduce immunity. More often, you should take yogurt to adjust the flora balance and protect the human body's resistance. After stopping the medicine, continue to drink yogurt for a period of time, which can greatly reduce the side effects of antibiotics and restore the normal flora balance of human body.

Take vitamins, minerals and other nutrients medicine can be delivered with yogurt. Yogurt contains fat, sugar and protein, which can protect and promote the absorption of nutrients. It should be noted that other drugs can not be taken by yoghurt, especially those containing heavy metals and alkaline substances.


14. 'yoghurt', 'yoghurt', 'wonderful yoghurt', 'lactobacillus beverage', 'yoghurt beverage', etc., who is the real yoghurt?

A: when choosing yoghurt, first of all, pay attention to the instructions on the package. Choose the product with protein content of 2.3% and the content is thick or frozen, then you can basically conclude that it belongs to yoghurt. Some other products are liquid, but the contents are relatively thin. The protein content is ≥ 1%, these products are made from milk, water, sugar, flavor, sour or fermentation agents. They are called yogurt drinks or Lactobacillus drinks. They can not be called yogurt, and they do not have any extra good effects on the human body.

It should be noted that the content of protein and fat in some yoghurt is much higher than that in ordinary yoghurt, mostly due to the addition of cream and whey protein, which has high calories and needs to be carefully bought by people who need to control their weight.

15. Is the long-term yoghurt imported from abroad better than the domestic yoghurt in the supermarket?

A: the yoghurt with long shelf life must have been sterilized by heating, and the Lactobacillus among them must have died out. Generally speaking, domestic refrigerated yoghurt contains live bacteria. Of course, sterilized yoghurt also has certain nutritional value, but the health value will be discounted. Compared with that, yoghurt with a large number of live bacteria is more recommended.