Apples as food are generally not bad for the kidneys when consumed in moderation. As a common fruit, apple has a water content of 85.9g/100g in general, which is a good food source for replenishing water and beneficial to the body. Apples contain a large variety of vitamins, including carotene, vitamin C, thiamine, etc., which is beneficial to the body to replenish a variety of vitamins and maintain the physiological function of the body. The content of thiamine is 0.06mg/100g, which is in the front of similar foods and can be a good food source of thiamine. Apples are rich in nutrients and generally do not affect the function of the kidneys. It should be noted that excessive intake of apples is prone to indigestion, and it is recommended to consume it with other foods in moderation for balanced nutrition. If symptoms of kidney disease such as edema and anorexia occur, you should seek medical advice to clarify the cause of the disease.