a cup of green tea, black tea, mate tea or even coffee has worked better than any of the "Endurance boosters" I've wasted loads of money on.
Provides ultra-intense muscle gorging strength, energy, power and endurance
For a stimulating effect to the body and mind
HAHAHAHAHA
The only thing that got jacked was your wallet.
Your claims about arginine..well, you already experience vasodilation as soon as you begin exercise, so that point is kinda null. As for increase HGH levels, nothing is conclusive in that matter, and there's a good chance that supplementing arginine for that purpose is just another thing that works only in theory.
Anyway, arginine should be part of your regular diet anyway. If you intake any protein, you're already getting arginine, and supplementing with extra is unlikely to have any significant effect on muscle growth.