The human body will produce a lot of acidic substances in the process of metabolism, but generally will be neutralized by the buffer substances in the blood, without making the internal environment of the human body acidic and acidosis, so the normal human internal environment is basically neutral, slightly alkaline, blood PH value (PH value, commonly known as pH, from 1 to 14, divided into 14 levels, generally 7 for neutral, 1 -6, 9 is acidic, 7, 1-14 is alkaline) is always between 7.35 and 7.45. In other words, when the blood pH is around 7.4, all the extremely complex biochemical functions in the body can be performed to the extreme, and all the waste can be discharged quickly and completely without accumulating in the body. However, the physiological characteristics of the elderly: the five organs are deficient, decomposition is greater than synthesis, the body’s extremely complex biochemical effects can not play to the extreme as those in the younger years, the ability of all the waste quickly and thoroughly discharged decreased, with the growth of age, metabolic waste, garbage will accumulate in the body, especially at the so-called menopause, endocrine (hormone) changes, the body’s various I think, in the age of menopause or senior citizens, when the biochemical indicators of blood fluctuate or are abnormal for a while, as long as there are no symptoms, don’t just take medicine, don’t carry a heavy burden of thought, don’t think that “when indicators fluctuate or are abnormal for a while, it must be a disease. In fact, the fluctuation or abnormality of blood biochemical indicators caused by endocrine changes and aging of the body of the elderly is not necessarily a disease, if it is a disease, it is also an aging disease, and there is only one disease caused by endocrine, so there is no need to worry and fear, as long as the attentive observation and food regimen, these blood biochemical indicators may gradually trend. Biochemical indicators may gradually trend stable or normal, food how to regulate, that is to pay attention to the acid-base balance of diet. If you take too much acidic food, beyond their own buffering capacity, will lead to the body to acidic, blood pH will be lower than 7.4, to acidic tilt disorders, over time, will lead to the failure of internal organs and produce a variety of diseases, so the elderly should try to reduce and control the one-time intake of acidic food, appropriate to increase some alkaline food. The so-called food acidity and alkalinity refers to the final elements of food metabolized in the body after digestion and absorption to measure its acidity and alkalinity, not just the nature of the food itself, such as the final elements of food metabolized in the body are potassium, sodium, calcium, magnesium, etc. – belong to alkaline, such as buttermilk, soybeans, tofu, spinach, lettuce, tomatoes, radish, potatoes, lotus root, onion, kelp, figs, watermelon, banana, pear, apple, black sesame, etc. Black sesame, etc.; (tomatoes and oranges, despite their sour taste, are strongly alkaline foods because their final element after metabolism in the body is potassium, etc.). Such as in the body after the metabolism of the final production of nitrogen, carbon, sulfur and other elements – belongs to the acidic; like beef, pork, ham, sausage, clam glaze, abalone, octopus, shrimp, oyster, scallops, cheese, sugar, cookies, peanut rice, coconut milk, chocolate, cream, white onion, fried things, etc.. When we eat at each meal, the food carries a certain level of acidity and alkalinity, which affects the acid-base fluctuation in the human body. However, some diseases can also cause a momentary disturbance of blood acid-base. For example, when a person has diarrhea, the general discharge is alkaline, the body alkali will be reduced while the acid will be relatively increased, so that the person’s blood is acidic, then you should supplement alkaline food, such as tofu, kelp, lettuce, radish, potato, lotus root, onion, apple, tomato, grapes, raisins, figs, cherries, yogurt, etc. to neutralize the acid-base imbalance; after a lot of vomiting, too much loss of stomach acid, the general body alkali will be relatively increased and make Blood is alkaline, and at this time should be properly supplemented with acidic food, such as pork, chicken, duck, beef, eggs, shrimp, cabbage, eggplant, peanut rice, coconut juice, etc. to achieve acid-base balance. Generally, rice, flour, meat, fish, eggs and other foods are almost all acidic foods, while vegetables, fruits, milk, yams, potatoes, soy products and kelp, seaweed, etc. are generally alkaline foods. Research has found that eating more alkaline food can keep the blood is weakly alkaline, making the blood lactic acid, urea and other acidic substances to reduce, and can prevent its deposition in the blood vessel wall, and therefore has the effect of softening the blood vessels, so some people call alkaline food as “blood and blood vessel cleaning agent”. Therefore, we must pay attention to the reasonable combination of acid and alkaline food, especially when eating too much acidic food such as meat, we should pay attention to some fresh vegetables, fruits and other alkaline food to neutralize these acidic substances, so as not to cause the body’s acid-base balance imbalance and cause calcium deficiency and a series of diseases. How to know whether your body is acidic or alkaline, the easiest way is to have a routine urine test, (because urine is something that is discarded, do not just have a blood test) urine will show acidity, when urine is sometimes acidic or alkaline, it means that the acidity and alkalinity of the diet affects the normal fluctuation of acidity and alkalinity in the human body, normal; if every time the urine test shows acidity, it means that its own ability to buffer acidity is reduced and tilted towards acidity, then it should Try to reduce and control the intake of acidic food and increase some alkaline food appropriately to prevent acidosis; if the urine shows alkaline in every laboratory test, it means that its own ability to buffer alkaline decreases and tilts toward alkaline, so it should reduce and control the intake of alkaline food and increase acidic food appropriately to prevent alkalosis. However, the clinical general acidic is more common, and the common diet is also more acidic. Therefore, in order to live a long and healthy life, the elderly must pay attention to understanding the acidity and alkalinity of food, and cannot blindly consume acidic or alkaline food for a long time, and the acid in the body for a long time will be acidosis, while the alkaline for a long time will be alkalosis as well. The acidity and alkalinity in the body should be kept in a relative and dynamic balance, often in neutral, slightly alkaline, so that your metabolism can operate normally, prevent the generation of disease or fluctuations in disease, and achieve the desire for a healthy life.