The BBC says so,
"My spies at Belfast City Airport tell me that when the hirsute Sinn Fein President made his way through security recently a large bottle of fluid was confiscated. Closer inspection revealed it was anti-wrinkle cream. Given that Gerry Adams is such a smooth political operator I can only assume this must have been a gift for someone else."
(H-T the inevitable Slugger - does anything move in those six counties without it appearing within 30 seconds on his site? )