RE: Caffeine, AAKG questions.
caffeine is a vasoconstrictor, AAKG is a vasodilator. By taking caffeine along with AAKG, you are rendering the AAKG useless, as it's effects on 'the pump' will be cancelled out by the caffeine
200mg is the standard dose of caffeine, yes.
Caffeine itself won't do much for weightloss