Lumen, the fitness tracker that claims to 'hack' your metabolism
Price: $ 87.99
4.7(77)
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
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Monitor your metabolism on the phone with a single breath - ISRAEL21c