There are two groups of most common fat burners. Lipotropics are the safest and softest substances for the body. Their purpose is to accelerate the process of utilizing fat stores, launched under the influence of physical exercises and healthy diet. The effectiveness of lipotropics is low, but there are no side effects and they are even useful. The main method of thermogenics action is a small increase in body temperature, acceleration of metabolism and suppression of appetite. They are bruleur de graisse puissant - the most powerful fat burners but also they have side effects.