According to an old wives' tale, "an apple a day keeps the doctor away." The saying promotes the idea that maintaining a healthy lifestyle, which includes eating fruit and vegetables such as apples, can help prevent illness and keep the body healthy. Apples are a natural source of vitamins and minerals, including fiber, vitamin C, and potassium, which are all essential for maintaining good health. This saying is a reminder that making healthy choices in our daily diet can prevent the need for frequent trips to the doctor.