According to a professor at Johns Hopkins it's impossible to take IGF-1 (the PED that is banned by the NCAA) orally. He said that a lot of people would be pleased if you could so that they wouldn't have to get injections anymore. TIFWIW but he said it is impossible to dose yourself with an oral spray.

To answer your question, I have no idea why anyone would trust people like these two guys. They are clearly modern day snake oil salesmen who are hell bent on helping relieve people of any spare cash they may have.