I was so eager to do my first day, calibration day, where you eat high carb all day and take multiple breaths to calibrate the device. New delivery was expected in July, then “late summer,” then “sometime in autumn,” and then FINALLY in late January, my Lumen shipped out. Indigogo emails talked about delays and science-y stuff. So that part of the product didn’t interest me. I knew, without a shadow of a doubt, that my Lumen would tell me that my body stayed on the carb-burning side. Those problems went away when I began eating a higher carb diet again about a year ago. I learned that eating low carb is very hard on my body, and causes all sorts of metabolic problems – high insulin, high glucose, wildly fluctuating blood sugar, and the problems that come along with depletion of muscle glycogen stores. Of course, eventually I figured my situation out on my own. I thought the Lumen could help me see what the variance was day to day, especially as I was still trying to figure out why I sometimes had excruciatingly hungry days in the 24 hours after certain exercises.

I’ve long been interested in my RMR, and various tests (electric-pulse tests and water-weigh tests) show mine to be anywhere from about 1450 to 1650. I bought into the pre-sales for the campaign. Originally, the product was supposed to release and ship in May 2019. The campaign also said that with this information, as well as determining the levels of CO2 in your exhalation, the Lumen could tell you if your body was in carb-burning or fat-burning mode, so that you could adjust your nutrition accordingly day by day. It purported to be a device that, with a single breath, could tell you your daily resting/basil metabolic rate. In the fall of 2018, I came across an Indigogo campaign for a product called Lumen.

Lumen metabolism reviews