. >> reporter: britney hennessey created a program to help online influencers build their brand. >> fort access to what someone else is doing, there's a lot of fomo, a lot of comparison. add on that of that instagram, how beautiful everything is, how beautiful people are. it makes sense that you can logon to instagram and leave feeling worse about yourself. >> one of the things that we heard in this hearing today, facebook's own research shows that instagram harms teenage girls. how could your company know that, do research on it, and ignore it? >> first, that's not an accurate characterization. and in terms of research, it's a very small survey of about 40 instagram teens who are struggling with mental health issues, and they were asked whether instagram makes things better or worse for them. on all 12 issues, the majority of both boys and girls who answered those questions said instagram either makes things better for them or has no material impact. >> reporter: the complicated relationship between young women's self-worth ask social media has been studied for years. >> you see somebo