For human health, acid/base balance refers to the biological balance inside the body or the balance of acidic and alkaline activities inside the body. The pH value characterizes the degree of acidity and alkalinity: the higher the more biased towards alkaline, the lower the more biased towards acidic.
Alkaline diet and health
The diet of human ancestors may be mostly plant-based foods, with little or no animal food intake, so their foods are more alkaline, compared with the typical Western contemporary diet Acidic diet.
The balance between acidity and alkalinity in foods can be characterized by the “Diet Acid Value” (DAL).
Acidogenic diets are rich in animal protein, while alkaline diets are more based on fruits, vegetables or beans.
Foods that affect acid-base balance
Meat, eggs, and dairy products are protein-rich foods that contain acidogenic sulfur. Plant foods contain very little sulfur and are therefore more alkaline. The development of human kidney disease (and the formation of kidney stones) depends to a greater extent on the choice of dietary protein types than on dietary protein intake.
Too high an acid load from the diet may increase ammonia production and damage those delicate lines that produce urine in the kidneys. The specific principle is: the kidney secretes a certain amount of ammonia (this is an alkaline substance) to neutralize the acidic substances produced by food metabolism. When the amount of ammonia is excessive, it will have a toxic effect on the kidneys. The kidneys of the human body will gradually decline in function with the passage of time. This is due to the long-term and slow renal toxicity of ammonia, not the kidney itself. Increasing the pH value will also increase the number of free radicals, which is also harmful to the kidneys.
Vegan diets are alkaline in nature, while non-vegan diets are acidic. Comparing renal function between the two groups, those who consumed plant-based foods had lower rates of renal function degradation. Those vegans benefit more than those who are regular vegetarians, while those who are vegans benefit more than those who eat meat. Obviously, the fewer animal products eat, the more benefits there are.
Meat or plants are not the only opportunities for dietary acid-base balance. The more refined foods you eat, the less fiber you consume (look at those who love snow-white flour and snow-white rice), the higher the acidity. Regular vegetarians consume more whole grains and beans to produce more alkaline. A high-fiber, low-acid diet keeps more people away from bowel cancer.
Alkaline urine can remove uric acid from the body. This is what the plant system diet does-it has a very positive effect on reducing malignant diseases such as stroke, heart disease, and death.
Is an alkaline diet really healthy or pseudo-science?
Impressions of Sydney, August 4th, as part of the alkaline diet trend, alkaline water, alkaline supplements, and prescriptive diet plans are now common features in health food stores, according to ABC.
Proponents of alkaline diets say that if you have too much acid in your body, it can have a negative effect on your health. Following basic dietary guidelines can prevent and cure a variety of diseases, including cancer and osteoporosis. Proponents of alkaline diets prefer vegetables and fruits, as well as special alkaline waters and supplements, to cereals and meats. So is an alkaline diet good for health? The answer is, of course, beneficial, but not the reason that alkaline diet supporters say.
What does alkaline mean?
Thinking back to high school chemistry, I would learn about pH or the acidity and basicity of substances. With a pH of 7, we say that the substance is neutral. The pH of water is usually around 7. As the pH value decreases, the acidity of the substance becomes stronger and stronger. For example, the pH of orange juice is 4 and the pH of battery acid is 0.3. When the pH is higher than 7, then we say that this substance is alkaline, for example, the pH of sodium bicarbonate is about 8.4, and the pH of bleach is about 12.
Acid gray matter hypothesis
The acid gray matter hypothesis, which originated 100 years ago, provides theoretical support for the “beneficial diet”. The theory is that protein and grains in the diet produce a large number of acidic substances in the human body, which will cause calcium to be lost from the bones, leading to osteoporosis. The acid ash or alkali ash we are talking about here is the residue left from the burning of food in a laboratory environment-these foods leave residues in your body after they are metabolized. Therefore, due to metabolism, some foods that were originally considered to be acidic, such as citrus, are actually alkaline.
Alkaline diet supporters sometimes measure the pH of saliva or urine samples to determine whether their body is alkaline or acidic. However, according to Clare Collins, a professor of nutrition and dietetics at the University of Newcastle, testing these fluids doesn’t give you “overall pH” because many different parts of your body have different pH values. Think about the pH travel of food in the digestive tract: it goes from saliva with a neutral pH to the strongly acidic environment of the stomach and intestines and is baptized with alkaline substances in the small intestine. This is how the digestion goes back and forth. The pH of the blood is the exact opposite of the rapidly changing pH in the digestive tract. The pH of the blood is strictly controlled between 7.35 and 7.45-slightly alkaline.
“This is crucial,” said Professor Collins. “If the pH of the blood is not slightly alkaline, you will be at risk of death. If the pH of the blood is not slightly alkaline, many enzymes will not function and minerals may form crystals into your blood. So this will cause human death. “Your body will keep urinating to keep your blood pH in this weakly alkaline range, but Professor Collins says that the supporters of the alkaline diet seem to understand it a bit too far Already.
Evidence does not accumulate
Although the original theory was that acidic substances cause calcium to be lost from your bones, a recent meta-analysis found that this was not the case. Alkaline diets are considered a way to prevent or treat cancer, but recent research has found no evidence that the pH of foods can affect the risk of cancer. Professor Collins said: “Since the sour gray hypothesis was proposed about a century ago, our understanding of nutrition and how our body works has taken a huge leap. We did not even find most of the vitamins 100 years ago. At that time we Do n’t know much about micronutrients. ”
Benefits of an alkaline diet
Are alkaline diets bad? “Surely not,” Professor Collins said. “The benefit of an alkaline diet is that it will encourage people to eat more vegetables and fruits.” However, it is unlikely to buy special alkaline water, supplements, and alkaline diet packages to make your body alkaline. It helps you find health in complex physical conditions because the diet does not change the pH of your blood-this is a good thing.
Professor Collins said, “For example, in terms of fighting cancer, the food source of cancer cells is the nutrients provided through the blood supply. You cannot change your blood pH or you die.” She advises those who want to improve themselves People with a health condition should not buy healthy products that look gimmicky but focus on a healthy diet based on science. “If you really want to invest in your health, you can spend the money on alkaline water or alkaline recipes for vegetables and fruits,” she said.