By checking breath, Levl says it can tell how much fat our body is burning. The device comes in two parts: users breathe into a grey pod and then insert it into a white docking station. A few seconds later, details about your fat burning levels appear on the outside of the dock. A companion app also goes in depth about what those levels mean in terms of calories burned and pounds lost.
Hopefully it will work by measuring the amount of acetone in a person’s breath. Whenever we consume lots of carbohydrates, those get broken down into glucose and used for energy. But if you eat less carbs, the body runs out of its primary energy source. So it starts burning chemicals in fats instead. This breakdown ultimately creates acetone, which is expelled in the breath. More acetone in the breath is supposed to correlate with higher fat burn.
It’s interested in letting you know just how much your body has turned to fat as an energy source over glucose. A spokesperson for Levl said the goal is to provide a snapshot for users about their diet trends to help them make healthier choices.