Clenbuterol is a beta-2 adrenergic agonist that bodybuilders use to manage their weight. This medicine has a steroid-like effect that increases the body's metabolism. Most athletes buy Clenbuterol 40 because the FDA approves it for weight loss, but it cannot be used in competitive sports. Clen was primarily developed to treat respiratory problems in horses but is now used by people to reduce asthma symptoms. This medicine relaxes muscles and lungs, so expect better airflow throughout the body. A