It is not credible to say that lemon turns stones. Because the human body’s internal environment is homeostatic, the acid-base balance is in a dynamic and stable process, and there are many buffer systems in the human blood, even after the intake of acidic or alkaline food, it will be neutralized by these buffer systems. Therefore, the PH value in the urine is a stable state, so there is no possibility of stones being melted away. It is not feasible to regulate the PH through food, because the effect is minimal, and only after a certain blood concentration is reached through medication can the PH of the urine be changed. Therefore, neither oral lemon nor other foods can have the effect of fossilization.