I am 100% certain that the overactive thyroid has nothing to do with HGH. The only drug I think he's done is cocaine in all those nightclubs he loves to go to with Luis Castillo. Of course, he might have done HGH, but if that's the case I still think it's got nothing to do with his thyroid. We should have seen many more instances of overactive thyroids in baseball if there was any serious correlation, no?