Clenbuterol is a steroid that comes under a class of drugs, namely beta2-agonists. It is mainly used to treat asthma, but it has now been used by people as a solution for weight loss. It is because of its impact on fat reduction and muscle growth. However, it has not yet been approved by the FDA for use in humans. According to the FDA, its liquid form can be used to treat airway obstruction in horses. On consuming this steroid, it has been noticed that it reduces body fat and increases muscle mass.