In our industry, clenbuterol (better known as clen) is typically called the "cousin" of ephedrine. That's since clen promotes beta-2 receptors as a beta-2 agonist. Basically, that indicates clenbuterol allows you to burn stored fat calories (your bodyfat) as energy prior to you reach other sources of fuel. Clenbuterol is authorized in certain EU nations as an asthma drug, however it's prohibited by the United States FDA. Nevertheless, it has actually found a home with livestock farming worldwide. It's fed to animals to increase fat free lean mass (FFL), so the animals get more muscles and less fat.