A study on mice at Cornell University found that the quercetin in apples may protect brain cells from the kind of free radical damage that may lead to Alzheimer’s disease.

The pectin in apples lowers LDL (“bad”) cholesterol. People who eat two apples per day may lower their cholesterol by as much as 16 percent.
According to another study, those who ate the most apples had a 50 percent lower risk of developing lung cancer. Researchers believe this is due to the high levels of the flavonoids quercetin and naringin in apples.
A Cornell University study found that rats who ate one apple per day reduced their risk of breast cancer by 17 percent. Rats fed three apples per day reduced their risk by 39 percent and those fed six apples per day reduced their risk by 44 percent.

Research shows that the pectin in apples reduces the risk of colon cancer and helps maintain a healthy digestive tract.
Research found that rats fed an extract from apple skins had a 57 percent lower risk of liver cancer.
The pectin in apples supplies galacturonic acid to the body which lowers the body’s need for insulin and may help in the management of diabetes.
A Brazilian study found that women who ate three apples or pears per day lost more weight while dieting than women who did not eat fruit while dieting.