How Clenbuterol Burns Fat

June 4th, 2008 by Paul Johnson

Clenbuterol (nicknamed Clen) is sold commercially as brand name Spiropent. Clenbuterol is a beta-2 agonist/antagonist and a bronchodilator. Like ephedrine, they both stimulate beta-2 receptors to cause direct fat loss. Unlike Ephedrine, clen does not stimulate the alpha-2 receptors and the have slighlty different mechanisms of how they act on those receptors and other parts of the body to induce fat loss.

Bodybuilders usually need a "source" to find Clenbuterol as it is not sold in stores or U.S pharmacies. Even though Ephedrine has many similiarities and is quite a good fat burner on itself, there is a couple reasons why Clenbuterol is considered better. The most important reason for bodybuilders using Clenbuterol is you can get more fat burning potential with Clenbuterol with less stimulant side effects. Clenbuterol seems to be more potent, while causing less jitteriness and stimulation of the heart for the same effects compared to ephedrine. The downside to this is the beta-2 receptors in the body also builds a tolerance much quicker with Clenbuterol than with Ephedrine.

Clenbuterol also has a very good nutrient partiotioning effect. In other words while you lose fat, you will maintain more muscle and lose more fat, than if you didn't use Clenbuterol. All the animal studies I have come across have shown Clenbuterol lowering fat and increasing muscle mass just by giving Clenbuterol to feed cattle, horses, and other animals. A study published in Vet Res Commun. 1993;17(6):459-68 showed that cattle gained 4% muscle mass and lost 40% fat, however 70 days after withdrawal of clenbuterol they had gained the fat back.

Clenbuterol has this potent fat burning and anabolic ability, due to how it causes the body to better utilize fat for energy instead of muscle. Ephedrine probably has similiar benefits, but there is not many studies on it. There is not any human studies on Clenbuterol use in humans, but ancedotal evidence from users supports the idea it has the same benfit in humans.