It is now well established that birth control medications (contraceptive steroids) increase breast cancer risk, especially if they are taken before the first full-term pregnancy, when breast cells are still immature. Birth control pills are very commonly used by young women. In one study, women who took birth control pills before the age of 20 had a more than ten-fold increased risk of breast cancer. The longer the pill is used, the higher the risk. Contraceptive steroids increase risk whether they are given orally (i.e., "the pill"), by injection (e.g., Depo_provera), implantation, through the skin with a patch, intravaginally with a ring (e.g., Nuva Ring) or with an intrauterine device (IUD). Even "low dose" estrogen pills have been associated with higher breast cancer risk.
Lanfranchi is an agenda-driven quack. She does not teach at a medical school — “clinical assistant professor” is a title that every medical school bestows on hundreds or even thousands of practicing physicians, and just means that if students do a clinical rotation in their practice, it counts — doesn’t mean even a single student ever has.
What study? How many women who took the pill before they were 20? What other characteristics did they have? What about the dozens of large studies that show nothing of the sort? You can find “one study” showing almost anything, but random little studies with wild outlier results are meaningless. I’m sure some leftist quack could find you “one study” that showed Republicans have much lower IQs than Democrats. But when you dig a little, you’ll find the study subjects were something like a dozen poli sci majors at a notoriously left-wing college, so it would hardly be surprising that the handful of Republicans who chose to attend such a college to major in poli sci were on the dim side.
The fact is that there’s a reasonably strong correlation between not having babies at a young age, and higher breast cancer rates. This holds true even for women who never used any kind of contraceptives because they weren’t sexually active. If you’ve got no family history of breast cancer, and a family history of ovarian cancer, taking oral contraceptives reduces your risk of cancer.