Some women were assigned to cut the fat in their diets to 20percent of calories – from an average of 35 percent – while others continued their usual diets. Yet the study so far has found the diet made little impact on rates of breast cancer, colorectal cancer and heart disease.160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! AD Quality Auto 360p 720p 1080p Top articles1/5READ MOREChargers go winless in AFC West with season-ending loss in Kansas CityUntil now, the only known prescription against ovarian cancer – aside from surgically removing the ovaries – was to use birth control pills. Use for five years can lower the cancer risk by up to 60 percent, protection that lingers after pill use ends. The new findings now offer an option for postmenopausal women to try as well. Those who followed a low-fat diet for eight years cut the chance of ovarian cancer by 40percent, researchers reported Tuesday. It’s arguably the most promising finding of the Women’s Health Initiative dietary study, which enrolled tens of thousands of healthy women 50 to 79 to track the role of fat in several leading killers. By Lauran Neergaard THE ASSOCIATED PRESS WASHINGTON – Cutting dietary fat may also cut the risk of ovarian cancer, says a study of almost 40,000 older women that found the first hard evidence that menu changes protect against this particularly lethal cancer. But the protection didn’t kick in until the women had eaten less fat for four years.