Apples are an excellent source of antioxidants, polyphenols, vitamins C, K, and potassium. They are also a great source of dietary fiber that may help lower blood cholesterol levels. Consuming apples may also help lower the risk of lung cancer, breast cancer, and colorectal cancer, among other types.
Pectin, which is a type of fiber in apples that acts like a prebiotic, which feeds good bacteria in the gut and may be the reason they protect against obesity, heart disease, and type 2 diabetes.
Scientists believe that their antioxidant and anti-inflammatory effects may be responsible for their potential cancer-preventive effects.
Seems there is a some truth to the old saying...
"An apple a day keeps the doctor away!"