ANNOUNCER: Growth hormone is one of the most complex and crucial substances produced in the body. Too much or too little of it can have serious...

ANNOUNCER: Philipp Baumann, a retired air line pilot, used to regularly experience symptoms of a serious medical problem without realizing it....

DAVID KLEINBERG, MD: Acromegaly is a disease of excess growth hormone. And the effects that excess growth hormone has usually comes from a pituitary...