The woman in the video looks resolute, and a little sad, as she cuts up a pack of birth control pills. “These silly little pills have literally ruined me as a person,” reads the caption. The clip, which is on TikTok, has 1.1 million likes. It’s one of thousands that have proliferated on social media in recent years with virtually the same message: The pill causes terrible, sometimes irreversible side effects, and women should free themselves from it.

Anecdotal reports from news outlets have suggested that women are quitting the pill in large numbers because of this type of online post. “We’ve known for a long time that people really rely on their social circles to help them with medical decision making as it relates to…