How do I measure fat loss on this program?

Short of a DXA scan, there's not a really reliable way to measure the specific amount of your body that is comprised of muscle. But, with the IdealSmart Scale or the BCA (Body Composition Analysis) scans using bioimpedance, it's possible to get a reliable measure of your changing body fat - and the 'lean mass' (everything other than fat) in your body. Speak with your coach if you need more information.