Talk about a buzzkill. It looks like part of Demi Moore's health problems stem from the fact she's been seeing "Red" for far too long. Hollywood's energizer bunny apparently has an addiction to the popular energy drink Red Bull. Although it might have seemed like a harmless habit, the 49-year-old has allegedly been replacing food and booze with countless cans of Bull, which has contributed to her drastic weight loss. One insider tells the New York Post that Moore's real problem is Bull, not booze. Says the source, "Demi avoids alcohol and instead drinks tons of Red Bull when she goes out. But in recent months she's not been eating much, so she's also been drinking it in the day to give her energy to get through." The spy adds, "She seemed drunk but I don't think any alcohol passed her lips, just loads of Red Bull. It's not a healthy way to live." According to TMZ, the Ghost actress has been receiving regular shipments of Red Bull to her house for almost a decade. In fact, people from Red Bull North America reveal that they even used the A-List actress to market the caffeinated drink. America may run on Dunkin, but Demi runs on Red Bull. Moore is currently in treatment for "exhaustion."