Multiple studies show it doesn't do anything, and we're pretty sure we know why: https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2779044 https://j

Multiple studies show it doesn't do anything, and we're pretty sure we know why: https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2779044 https://jamanetwork.com/journals/jamanetworkopen/fullarticle...