We thank Dizdar and colleagues for offering an alternative explanation to our finding of no risk reduction of postmenopausal breast cancer with higher vitamin D intake.1 They suggest that the positive interplay between vitamin D and estrogens might have attenuated the protection of vitamin D against breast cancer development among postmenopausal women.
Lin J, Zhang SM. Vitamin D Intake and Breast Cancer Risk in Postmenopausal Women—Reply. Arch Intern Med. 2007;167(22):2532. doi:10.1001/archinte.167.22.2532-b