The pH of a neutral substance such as pure fresh water (not acid or alkali) is 7. If a substance has a pH above 7, it is considered alkaline, while a substance with a pH below 7 is an acidic substance. Milk is usually considered to be alkaline but actually slightly acidic. Depending on the mode of production, the pH of the milk is usually between 6.3 and 8.5. On the other hand, yogurt is processed with beneficial bacteria, so it is naturally more acidic than milk. This is because probiotics convert lactose to lactic acid, which increases the acidity of the final product. Lactobacillus acidophilus is the most commonly used bacteria for the production of yogurt, with a pH of 4. The average pH of the yogurt is about 4.4.
Acidic food and health
Yogurt has high nutritional value and is rich in probiotics, so it is good for health. Although it is acidic, carbon does not affect health. In general, healthy people who eat such pH acid foods will not experience any adverse reactions.
However, acidic foods are annoying for people who often have heartburn or stomach acid reflux. Although heartburn and stomach acid reflux are often associated with many non-dietary causes, some people may induce or aggravate the disease by eating certain foods. These include acidic foods such as citrus fruits and fresh tomatoes. Because yogurt is also acidic, it can also cause heartburn in some people. However, because fat is also one of the causes of gastric acid reflux, health experts often recommend people who follow a stomach acid reflux diet to eat low-fat dairy products.
A principle of acid-alkaline diet
When it comes to food acidity and alkalinity, it sometimes represents something other than pH. In the acid-alkaline diet theory, these terms also refer to acidic or alkaline substances that are produced when food is metabolized. In other words, eating a diet that contains a lot of sour food can cause the body to be acidic. Based on this theory, if the refined grain and sugar content in the diet is high, but the vegetables are small, a large amount of acid will be produced. Proponents of this dietary theory believe that eating more alkaline foods is more beneficial to health.
The theory also believes that most vegetables and many fruits are alkaline, while all meat and most dairy products are acidic. The pH of the food itself does not determine whether it is metabolized to an acidic or alkaline substance. For example, lemons are highly acidic but are considered highly alkaline foods. Pure yoghurt is often considered a sour food, while sugary yoghurts are often considered medium or high in acidity.
In addition, the acid-base diet theory believes that eating too much acid-producing food can cause mild chronic metabolic acidosis or acid accumulation in body fluids. Although this condition can occur when type 1 diabetes is out of control, patients with renal dysfunction or liver failure who eat sour foods are not responsible for metabolic acidosis.
Although yogurt is acidic and is considered a sour food, eating yogurt does not cause an imbalance in the body’s pH. This is because the healthy body has the ability to control its liquid pH while absorbing and metabolizing nutrients.