Um, right, exogenous and endogenous HGH, if there’s no difference between the two, how can you devise a test to catch the athletes doping with HGH?
Well, like I said, a molecule of HGH is a molecule of HGH, no matter whether it’s exogenous or endogenous. But there might be a statistical difference between a population of exogenous HGH molecules and a population of endogenous HGH molecules. Q: You’ve lost me. A: Let’s say I have a bunch of yellow M&Ms in my pocket. Without your knowing it, I take my yellow M&Ms and put them into your bag of M&Ms. My yellow M&Ms are exogenous, because they come from outside of your bag. How can you tell that you have exogenous M&Ms in your bag? Well, you can’t tell by testing any single M&M – they’re all genuine M&Ms. But if you empty the entire bag and count the number of M&Ms of each color, you’ll notice that there are too many yellow M&Ms. The M&M candy people wouldn’t put so many yellow M&Ms in the same bag. There has to be some other explanation.
