Beer contains estrogen!? [update]

Oh my gosh! Read that:

I’m not sure if this is true but since I don’t like beer anyway I’ll just stop drinking it :) . Please, anybody who has evidence – write me (own beer bellys and man boobs do not count as evidence)!

UPDATE: Ok, Mehdi gave me a hint … beer contains hops (of course!) and now google for hops and estrogen :-/. No beer for me anymore!!!