New study warns about impact of TikTok on adolescents l GMA

The National Institutes of Health explores why some kids get hooked on social video feeds and the effect they may have on brain development. SUBSCRIBE to GMA's YouTube page: https://bit.ly/2Zq0dU5 VISIT GMA's homepage: https://www.goodmorningamerica.com SIGN UP to get the daily GMA Wake-Up Newsletter: https://gma.abc/2Vzcd5j FOLLOW GMA: TikTok:   / gma   Facebook:   / goodmorningamerica   Twitter:   / gma   Instagram:   / goodmorningamerica   WATCH full episodes: https://abc.go.com/shows/good-morning... https://hulu.tv/2YnifTH #GMA #TikTok #Parenting #SocialMedia