Angelina Jolie is known for throwing herself into her roles, whether it’s playing a grief-stricken mom in Changeling or a sociopath in Girl, Interrupted. But now, her real-life role as a U.N. ambassador is affecting the mom-of-six so profoundly that friends are concerned she’s endangering her health.

The Oscar winner, who is dedicated to the cause of refugees, is looking superskinny and friends worry that she could be headed for an eating disorder. When she was younger, Angelina struggled with an eating disorder and self-mutilation, and experts say that it can be a slippery slope for sufferers, particularly when stressed.

“Brad has been trying to talk to Angelina about her weight and she’s telling him to back off,” an insider tells BettyConfidential. “She doesn’t think she is that skinny, but everyone around her says she’s become skin and bones. You can see the veins in her arms and her collarbone. She just doesn’t eat. She only takes bites of the kids’ food and that’s it.”

Back in 2007, Angelina’s brother, James Haven, admitted that his sister has issues with food. “She sees food differently and she feels guilty about what she has compared with so many starving people who she wants to help.”