Effect of a Low Glycemic Index Diet on Breast Density

Inclusion criteria

* Are between 40 and 60 years of age * Still menstruating with at least 10 menstrual cycles in the previous 12 months * Not Taking hormone replacement therapy * Stable oral contraceptive use (no changes is use in past 12 months nor changes intended during interventional period) * Have not been previously diagnosed with breast cancer, DCIS,lobular carcinoma in situ, atypical lobular hyperplasia or atypical hyperplasia * No history of breast augmentation or reduction surgery * Have no history of any other malignancy (excluding non-melanoma skin cancer) in the previous 5 years * Have no history of diabetes or other metabolic diseases requiring dietary modification * Have a study baseline mammographic density of at least 50% as estimated by mammographer * BIRADS 1 or 2 mammogram if first ever mammogram, otherwise stable mammogram (no change since previous year) * Have not followed a weight reduction or Atkins typs diet in the past 6 months Not pregnant or lactating in the past 12 months, nor intending pregnancy during the study period * Successful completion of three baseline telephone-administered 24- hour dietary recalls