Lumen: Hack your metabolism Lumen is the world’s first hand-held, portable device to measure and track your metabolism. See if your body is using fats or carbs for fuel in a single breath.
Keto Zone Diet by Dr. Don Colbert | The Fastest Way To Burn Fat The Keto Zone is the point at which your body switches from burning carbs as fuel to burning fats as fuel. This transition is referred to as the Ketosis. Achieve optimal healthy living through Dr. Colbert's Keto Zone Diet