Although people eat foods with different pH values, some are acidic and some are alkaline. In this sense, food can be divided into acidic food and alkaline food. But this distinction is meaningless, because no matter what food is eaten in the stomach, it becomes "acidic food". Gastric acid is strongly acidic (containing 0.2% ~ 0.4% hydrochloric acid), and the pH value can be as low as 1 ~ 2. Under its action, all foods become acidic. Food enters the intestine from the stomach and is neutralized by alkaline intestinal juice, becoming "alkaline food". Therefore, whether the food you eat is acidic or alkaline, the result is the same. First it becomes "acidic food" and then it becomes "alkaline food".
If the blood pH rises, it is acidosis or alkalosis, and it needs treatment or even rescue, not sub-health as merchants say.