The alkalinity of fruit refers to its metabolites. Generally, fruit contains many organic acids, such as citric acid, which make the PH value of fruit relatively low when measured, but the final metabolites of organic acids in human body are water and carbon dioxide. The fruit also contains a lot of potassium, sodium, magnesium and iron plasma, and these ion metabolites are alkaline, so the fruit is generally alkaline.

alkaline foods include vegetables, fruits and seaweeds, among which kelp is called the king of alkaline foods, and people's blood is generally weakly alkaline, but when people eat a lot of high-fat and high-protein foods such as fish, eggs and milk, their blood will be slightly acidic after digestion and absorption. At this time, eating more alkaline food is beneficial to human health.