dude, read product labeling closely. it tells you it's deer antler extract!!! wtf? never heard that spraying deer antler into your mouth will produce igf peptides. it's another b.s. product being sold to newbies who don't know better. if you want igf, your better of searching threads and finding a reliable source for what you want. not to be rude, but ayone who believes this is the same as igf, should also try sucking off a deer for there pure protien needs.