The MedGem is a small handheld device that measures your resting metabolic rate (RMR). The MedGem has been approved by the FDA as an effective method to measure the number of calories your body uses at rest each day. Why is this important? By knowing your RMR, we can work together to determine calorie needs for weight loss, gain or maintenance and improved sport performance. This helps us create a tailor-made program according to your individual needs.