Earlier this year, Surgeon General Dr. Vivek Murthy issued a new advisory about the effects of social media on the mental health of young people. These advisories are rare; we're used to seeing them on the sides of cigarette packs, where the negative health risks are indisputable. But social media and smartphones are more complicated. Today on ParentData, Dr. Murthy discusses the individual and systemic issues that led him to issue the advisory, and what he hopes, as both the nation's doctor and his kids’ father, it will accomplish. Subscribe to ParentData.org for free access to new articles every week on data-driven pregnancy and parenting.