https://www.reuters.com/article/usa-congress-facebook-instagram/facebook-research-shows-company-knew-of-instagram-harm-to-teens-senators-say-idUSKBN2GQ250 >U.S. senators on Thursday grilled Facebook Inc on its plans to better protect young users on its apps, drawing on leaked internal research that showed the social media giant was aware of how its Instagram app harmed the mental health of teens.