A new study has found that there may be a very simple way to drastically cut your risk for cancer — as long as you start out young.

The study found that something as simple as eating more fruits and vegetables in your teenage years can drive down cancer later on in life, according to a BMJ statement.

Scientists are increasingly realizing that cancer’s drivers start early in life, both in terms of genes and exposure to cancer-causing carcinogens, and taking early steps can do a lot to lower the risk of cancer. Researchers at Massachusetts General Hospital and Harvard examined how diet duringa dolescence may affect this risk.

They examined 90,000 women in the Nurses’ Health Survey who answered questions about their typical diet in their teenage years. Those who ate nearly three services of fruit per day showed a starling drop of 25 percent in developing breast cancer.

Apples, bananas, and grapes seemed to do the best job at cutting cancer risk. Eating kale and oranges in adulthood seemed to do a good job as well.

Apples, bannans, and grapes have a lot of fiber, which could explain why they are so good at reducing the risk of cancer. They also have flavonoids, which act as antioxidants.

“They followed the health of nearly 22,000 post-menopausal women in Denmark and found that women who increased their alcohol intake by two drinks per day over five years had around a 30% increased risk of breast cancer but around a 20% decreased risk of coronary heart disease, compared with women with a stable alcohol intake,” the statement reads. “However, results for women who decreased their alcohol intake over the five year period were not significantly associated with risk of breast cancer or coronary heart disease. Altogether, the authors say their findings support the hypothesis that alcohol is associated with breast cancer and coronary heart disease in opposite directions.”