I hear crank will do a fine job. 
Sorry...I couldn't resist. To be honest, I am not a big fan of any of the "supplements" that claim to increase your metabolism. Your metabolism is set genetically and all these supplements do is put your body on a "fast forward", often resulting in feeling jittery, etc.
Your best bet is diet and lifestyle change (and not the type that now allows you sing out proud in Obama's military). Drink TONS of ice cold water (your body has to burn calories to heat it before it can be metabolized), cut out complex carbs (but keep the veggies), take the stairs, don't look for the closest parking spot, etc. It all adds up.
We bring evil things to evil people, kicking in a door near you!
."In theory, there is no difference between theory and practice. But,
in practice, there is."
- Jan L.A. van de Snepscheut
"The difference between 'involvement' and 'commitment' is like
an eggs-and-ham breakfast: the chicken was 'involved' - the pig
was'committed'."
-unknown
Working on a PhD in CQB one doorway at a time.
When the wolf attacks, he will find not all who run with the flock are sheep!