We observed that women in the low-fat diet group had a 9 percent lower risk of breast cancer than the usual diet group, but that difference could be due to chance.
We think that women who are currently on a low-fat diet can confidently continue on such a diet.
We don't regard our data as strong enough at this time to recommend that all post menopausal women start a low fat diet for the purpose of reducing breast cancer risk.
We did not see evidence of any adverse effects of a low-fat diet, and we see some trends toward health benefits, especially for breast cancer. So, we think that women who are currently on a low-fat diet can confidently continue on such a diet.