1, will expire. Expired vinegar may cause microbial contamination and deterioration, and eating it may cause diarrhea and gastroenteritis. It is rumored that "vinegar will not go bad after a long time", even after the shelf life on the package, it can still be eaten. There is even a saying that "the older the vinegar, the more fragrant it is". Once the shelf life of vinegar exceeds, it will be polluted and deteriorated by microorganisms and bacteria, especially such household condiments, which are often placed in a humid and high-temperature kitchen environment. After opening, the bottle cap is always open and closed, which may be affected by moisture, bacteria and foreign objects. Eating expired vinegar in the stomach may cause acute gastroenteritis, nausea, abdominal pain, diarrhea, fever and other symptoms.
2. Generally, vinegar needs to undergo SOP procedures such as sterilization before it is manufactured. But once opened, there is no guarantee that the storage conditions are completely sterile. Therefore, people are advised not to use expired vinegar at home. As for whether vinegar will "get more fragrant with age", "aged vinegar" brewed with fermented grains and fruits may indeed become more mellow and gentler because of longer fermentation time. However, the brewing period of these mature vinegar is as long as 8 10 years, which is not equal to the "expired vinegar" at home.
Can drinking vinegar change acidic constitution?
No! The pH value of the human body mainly depends on the physiological balance mechanism in the body and will not change because of what you eat. "In fact, acidic constitution does not exist! This statement itself is a fallacy. The normal human body's pH value is about 7.4 (nearly neutral and weakly alkaline), and the human body mainly relies on the "three physiological systems" in the body, such as respiration, kidney and blood, to maintain the stability of pH value. Carbon dioxide is excreted by lung respiration, and urine is metabolized by kidney, which regulates the buffer in blood and keeps the body in an "acid-base balance" state. As long as the lung and kidney function are normal, the pH value in the body will not change suddenly because of what you eat. Therefore, whether you drink a large glass of lemon juice, be jealous, or drink a lot of so-called "alkaline water" on the market, it will not change your physique or your pH value.
Can drinking 1 cup vinegar immediately after getting up in the morning improve constipation?
No! There is no medical proof that drinking vinegar can promote defecation; Meanwhile, it is not recommended to drink vinegar on an empty stomach in the morning. Generally speaking, the concentration of acetic acid in vinegar on the market is about 3% ~ 5%, and the pH value is about 2 ~ 3, depending on the product and content. So it is not recommended to drink on an empty stomach in the morning. If the stomach is not good, the stomach of patients with gastric ulcer is sensitive person, which will cause discomfort and even damage the stomach wall. Dr. Yan suggested that if you really want to drink vinegar, you'd better drink it one hour after meals and dilute it with water. After people drink vinegar, the acetic acid in vinegar will cause the phenomenon of "delayed gastric emptying", that is, the digestion time will be longer, the food will stay in the stomach for a longer time, and it is easier to feel full. However, in the view of western medicine, it cannot be proved that drinking vinegar can promote metabolism, defecation or even slimming. Therefore, it is not recommended that people try to lose weight and improve constipation by drinking vinegar.