A family friend of Jolie's beau Brad Pitt revealed to Life and Style Weekly that Jolie has been taking pills that contain stimulants to increase metabolism, in an attempt to get more energy.
However, this has boyfriend Brad very worried, especially as he's trying to cope with taking care of the couple's four young kids.
The source also revealed that the stress was putting new strain on their relationship.
"Brad's very worried about her long-term health. [Brad] says the whole thing is putting a new strain on their relationship," Life and Style quoted the pal, as saying.
"He's tired from looking after four young children, and he feels like he has to baby-sit Angelina, too.
"The poor guy is frazzled, and he doesn't know how much more he can take," the pal added.