How long is the shelf life of homemade yogurt

Nowadays, people love to make their own yogurt at home, but homemade yogurt always goes bad, which is very wasteful. It is still necessary to drink it within the shelf life. Generally, it is best to drink the yogurt within 24 hours after opening, because after this time, the substances in the yogurt will change, so it will taste abnormal when you drink it.

1. Fruit ingredients cannot be added to any strain of yogurt, let alone fruit-flavored yogurt.

2. If the temperature of milk is too high, it will kill the lactic acid bacteria in the yogurt and cause fermentation failure. If the temperature is too low, it will cause slow fermentation. The temperature should not be too hot to touch (microwave heating often causes uneven heating, so you should stir it with a spoon and then test the temperature).

3. Do not use the insulation setting of the rice cooker for fermentation, because the insulation temperature is too high. During insulation fermentation, the rice cooker must be turned off. If you make yogurt in winter, you can put the porcelain cup on the heater to ferment.

4. It is best to use a porcelain cup with a lid as the fermentation container. A hard plastic cup is also acceptable, but if the quality of the cup is not up to standard, it will easily deform during heating and disinfection. The lid is very important. Lactic acid bacteria are anaerobic bacteria, and an anaerobic environment is more conducive to fermentation.

5. It is best not to use disinfectant when disinfecting the container, because if it is not rinsed clean, it will kill the lactic acid bacteria and cause fermentation to fail. Heat sterilization is the safest method.

6. Antibiotic milk (containing antibiotics) or reconstituted milk (milk reconstituted with milk powder) are not suitable as raw materials for making yogurt.

7. The quality of bacterial yogurt is unstable and sometimes the fermentation fails. In order to ensure the quality of yogurt, you can go to the pharmacy to purchase some golden bifidobacteria as a pure strain (the quality of golden bifidobacteria is beyond doubt. And the fermented yogurt is rich in bifidobacteria and thermophilic streptococci, which is good for health)

8. The best time to drink yogurt is after a meal. When you are hungry, high stomach acid can kill lactic acid bacteria.

9. Yogurt has a mild laxative effect and is not suitable for infants;

10. In order to preserve the activity of the probiotics contained in yogurt, it is best not to drink hot drinks before or after drinking yogurt. Also, don't drink strong tea or take antibiotics.

11. Yogurt cannot be heated before drinking. In summer, it is best to buy and drink it immediately. In winter, you can leave it at room temperature for a certain period of time before drinking.

12. Don’t drink yogurt on an empty stomach.

When you are hungry, it is best not to eat yogurt to fill your stomach, because the acidity in the stomach is high when the stomach is empty (pH 2), and the lactic acid bacteria are easily killed by stomach acid, thus weakening the health-care effect. About 2 hours after a meal, the gastric juice is diluted and the acidity and alkalinity in the stomach (the pH value rises to 3-5) is most suitable for the growth of lactic acid bacteria (the pH value suitable for the growth of lactic acid bacteria is above 5.4). Therefore, this is the best time to drink yogurt. However, for people with constipation, drinking yogurt before meals can actually help with bowel movements. For people with normal gastrointestinal function and no diarrhea, they can drink it before or after meals as long as they are not particularly hungry.