Cook told FoxNews.com, "I did not grow up getting told about how manipulated the images we see of women and girls out there are, and I think it's an absolute travesty that young women are seeing what the media is feeding them."
"It breaks my heart to be part of an industry and part of a machine that really pushes out these images and propagates these really terrible standards that are false."
The actress also shared her struggle with body-image issues after her first film The Baby-Sitters Club, when she was 15.
"I remember gaining quite a bit of weight on the first movie that I worked on because, 'hey, free food!'"
"You're at that stage where your body is just changing so actively, so it was a natural change, but I remember finishing that film and realizing that I had gained probably 10 pounds over the course of filming which is a lot when you're only 5'2."
Cook, who starred in the 1999's smash hit She's All That, said she knew then that she just needed to try and be healthy.