Ive been researching IGF-2 by applied neutriceuticals and i came across a product from NOW's called IGF-1, which is extracted from Deer Antler Velvet. What is the difference between IGF-1 and 2? I always though IGF-1 was incredibly expensive? How can it come from deer antlers? please someone let me know whats the deal with this and if deer antler IGF-1 actaully does anything.