Thermogenic Fat Burners are the most popular and most widely used category of fat burners. The majority of the products in this line represent a combination of different substances all having metabolic rate & body temperature increase as a primary purpose.

This effect is often achieved by adding stimulant substances such as caffeine, ephedrine, Synephrine HCL or yohimbe to the supplement formula. However, if you do not want your energy levels and stamina to depend on any kind of stimulant substances then you can always prefer non-stimulative thermogenics there is a whole variety of those on the market as well. This is also a good alternative for heart-conditioned people.

Side Effects?

Side effects of fat burners include feeling jittery, restlessness, being agitated or excitable, dramatically increased blood pressure, thinning of the blood. Medical issues that may have to be dealt with include hypertension and heart arrhythmia.