Vinegar is an acidic substance with a ph value of less than 7, but as a food, it is alkaline. Acid and acidic food are two different concepts. The scientific name of acetic acid is acetic acid. Before it is absorbed and metabolized by the body, it is unapologetically acidic.

Generally speaking, all acidic substances are acidic, and when acetic acid stepped from the realm of chemistry into the realm of food nutrition, acetic acid became an alkaline food. The pH of acid-alkaline foods is not necessarily related to the pH of the substance before it enters the body.

Judging the acidity or alkalinity of food mainly depends on the alkaline elements contained in the food, the acidic elements and the results of organic acid metabolism in the human body, usually a simple way to determine the food containing chlorine, sulfur, phosphorus and other non-metallic elements are high, because it is ingested into the human body, the final metabolite is acidic, mostly acidic food.

Foods containing calcium, potassium, sodium, magnesium and other metal elements are alkaline because their final metabolites are alkaline after being ingested into the human body. Acetic acid that enters the body undergoes a series of biochemical reactions and finally generates carbon dioxide and water, while carbon dioxide is eliminated by the lungs, thus reducing the carbonic acid content of the blood and making the body fluids weakly alkaline. Acetic acid is an alkaline food.