Editor’s Note: This article was originally published in 2018 and is preserved for historical interest. Some recommendations, regulations, and scientific evidence have changed since it was written. It reflects the research and perspectives available at that time.
In an animal study appearing in Carcinogenesis (2009;July:30(7)), scientists found that vitamin C may protect against estrogen induced breast tumors. The study was performed on rats bred to easily develop breast tumors. In animals given estradiol, 82% developed breast tumors. Rat who were given a combination of vitamin C and estradiol had 29% fewer tumors over the 240 day course of the study.
