Weight lost during a clenbuterol cycle is highly dependent on dosage, cycle and existing metabolic rate. Clenbuterol is a bronchodilator that also increases the basal metabolic rate, which varies by individual, explans Cayman Chemical Company. It isn't approved for weight loss and is a dangerous substance that shouldn't be used.
According to Cayman Chemical, clenbuterol is a beta-two receptor agonist that can be used for bronchodilation, performance enhancement, and weight loss. Clenbuterol poses a number of detrimental side effects, including heart palpitations and muscle tremors. It is used by some athletes to alter body composition and promote the development of lean muscle mass. Its use is banned by the FDA.