metabolic enhancer before AM cardio

[b1982]

would anyone recommend or advise against taking a metabolic enhancer (i.e. xenadrine) before a moderately intense AM cardio session...

i have a very high metabolism and i do about 20 min on the treadmill in the early AM before work...7mph to 8.5 mph

[Beast]

If you have a very high metabolism, why would you be taking a metabolic enhancer???