The One Tree Hill star is FURIOUS at the retail chain for selling a t-shirt that says “Eat Less!”

Sophia Bush, 28, has always been an avid promoter of healthy body images for women, but now she’s taking her cause to new heights by launching a boycott against Urban Outfitters. “I have been a supporter of your store for many years, but now I’m through,” she writes in an open letter to the retail chain, which she posted on her blog. “Perhaps some of the American population could stand to take the shirt’s advice, but for those impressionable teens who shop at Urban Outfitters, its message is more pro-anorexia than anything, especially when worn by an emaciated model.”

Click to read more about Sophia’s boycott!