I have been using the Lumen device for over a year now! It measures the Co2 in your breath to tell you whether you are burning carbs or fats for fuel-at any given moment! Come see how I have been doing and how this little "nutritionist in my back pocket" has helped me on my weightloss goals as a busy mom. Code: FITMOMMY for $50 off your Lumen for the first 100 people at lumen.me Watch my original Lumen video here: youtube.com/watch?v=-kNXgQuOkY0&t=1s #lumen