PERSONALIZED WEIGHT LOSS WITH A SIMPLE BREATH. Understanding a patient’s ability to burn fat is a critical piece of their weight loss journey and road to success. With LEVL – an FDA cleared device – you can accurately predict individualized fat loss and personalized weight loss programs by measuring acetone in the breath. Based on 50 years of breath science research, the LEVL device gives you personalized, real-time data about how much fat your body is burning per week. It complements any weight loss program and is covered by insurance. LEVL allows for true personalized weight-loss and weight-management coaching based on accurate fat-burning measurements and can reduce time spent on weight loss programs that are simply not working.