Coffee and cacao powder. Arginine is great too but tastes like crap so I usually have that in a shot of juice then have my main drink afterwards. Or you could get arginine caps (or make them). I usually take a few supplements before the gym (vit c is a must for me).
There are lots of combinations. Key ingredients I use are...
Caffeine
Arginine
Cacao
Chocomine
Waxy Maize Starch or Vitargo
Sea Salt
Vit C
Pycnogenol
My all time favorite is a ECA/Or Clen dosage...Then a small reg. size coffee and early morning cardio on an empty stomach...It almost makes torture a bit fun:lightbulb:
The early morning cardio like that burns the fat right off.:smoking: