Here are some explanations to remove the confusion when it comes to fat loss supplements. Some products overlap in the categories such as Thermalene which is a thermogenic & thyroid regulator.

Thermogenics:
In the past, fat burners without ephedra didn't work all that well. Luckily, research has intensified in this area and the latest products are really helping people lose fat fast. The basic idea is that if they can raise your metabolism even a little bit, you will burn more calories each day, even while resting.

Carb Blockers:
These are a great thing to use alone to increase weight loss or in conjunction with thermogenics or other fat burners. HCA (Hydroxy Citric Acid) is the main ingredient that helps with 'carb blocking'.

Thyroid Regulators:
Thyroid supplements are actually thyroid replacements for what your body would normally produce. This is great because you can regulate and optimize your thyroid so it performs at a higher level than it can on its own. And when you do this (along with proper exercise and diet), suddenly body fat will be nowhere to be found. Popular thyroid enhancing ingredients are guggulsterones and Coleus forskohli.

Fat Mobilisers:
These help transport the fats to the blood-stream to be utilized as an energy source. Can be used effectively if you are susceptible to stimulants in thermogenics or even alongside thermogenics.