Lumen, the fitness tracker that claims to ‘hack’ your metabolism, is now available

It was nearly two years ago that we first covered Lumen, a gadget and app combo that claims to track your metabolic flexibility — how good your body is at switching between energy sources. It does so by measuring how much carbon dioxide you’re exhaling, which indicates whether your body is currently burning carbs, fats, or a mix of both. The more flexible your metabolism, the easier it is to lose weight (and keep it down), gain muscle,  and optimize workout performance. So claims Lumen, citing some research along the way. Its founders, twin sisters Merav and Michal Mor, both have… This story continues at The Next Web