If you want to burn fat fast, thermogenic fat burners are the way to go. They are designed specifically to increase your metabolism, which allows you to burn more calories! Thermogenesis is the process by which the body generates heat, or energy, by increasing the metabolic rate above normal. The basic idea of the termogenic products is that if they can raise your metabolism, you will burn more calories, even while resting. A good thermogenic supplement increases your metabolism, help to burn calorie and more fat, and boosts your energy level and mental alertness by stimulates the sympathetic nervous system.