To compare fat burn supplements will take a look at fat burn diet pills. Fat burn diet pills can be used to help speed up the process of burning fat. They can also be used to get you over the hump of burning off those last couples of pounds.
As for which to take, there are literally hundreds to chose form. Below is a list of pills that I have researched and are worth taking a look if you're looking to buy.
Hoodia Gordonii is an all-natural appetite suppressant, derived from a cactus-like plant and grown mainly in the Kalahari Desert region of South Africa.
This plant received a lot of press a few years back mainly of because of not evidence of side effects.
Reports stated that the indigenous people would use the plant to suppress appetite when going on long hunting trips. If you're looking for an all-natural pill, this may be for you.

Green tea diet pills have become very popular on the market today.
The reason probably has to do with the documented health benefits associated with the tea such as decrease risk of contracting certain cancers and lowering of bad cholesterol.
As for fat burning effects, it has an ingredient called catechin polyphenois that works with some other chemicals in your body to oxidize fat so that you can burn it more easily.
This effect increases your metabolism, thereby helping you to burn more fat.

Twinlab is a leading supplier of health supplements and has a host of dietary products to chose from.
There Ripped Fuel is one of the more popular products. Since it's now Ephedra free, you no longer have to concern yourself with the "shakes" when you stop taking it.

Stacker 2 is another popular fat burning supplement.
It's synergistic combination of ingredients includes green tea and kola nut extract, two widely used fat burning stimulants.
If you're cutting back on caffeine, you'll probably will want to stay away from this one.

Alli Weight Loss started out as a prescription diet solution. The FDA has now approved it for over the counter use.
It works by absorbing the fat from foods you eat every day- fast foods and ice cream too.
Just because the pill is designed to absorb fats, doesn't mean you should go hog-wild with what you eat. Following a healthy, heart friendly diet is always the best way to go.
Overall, a comparison of each fat burn supplement works by either speeding up your metabolism or by inhibiting fat absorption. Advertising aside, which one you chose will be a matter of your level of comfort with the way it burns fat as well as your personal preference.