Recently Dr Aric Sigman in his article 'A Source Of Thinspiration?' stated that seeing women on screen who are underweight, but perceived as "normal" can be harmful to females of all ages.
He believes the issues is biological and results in females becoming unhappy when they look at countless images of underweight women, that they are confronted with on a daily basis. His studies found "strong and immediate" brain changes in otherwise healthy women, when they are exposed to images of very thin or overweight females.
In the article Dr Sigman argues that the relationship between the media and body image, previously believed to be psychological or cultural; is in fact medical and should be treated as such.
Dr Sigman's findings are certainly thought provoking, however it's still very early days in the research process. We will watch any developments with interest.