There are the same disclosures as the pre-print and a clear explanation of which authors contributed to which parts of the study. In 2023, Lumen now has a peer-reviewed validation study. Lumen was also transparent in acknowledging these shortcomings during my reporting. This wasn’t ideal, but it’s understandable as the company was in its early days. When I first reviewed Lumen three years ago, the company provided me with a pre-print validation study that had the appropriate conflict of interest disclosures. Lumen uses terms like “scientifically validated” and “peer-reviewed” in its marketing, but none of it raised major red flags. When I asked Lumen, they said the only change lies in some of the internal components. Lumen sent me its second-gen device, and I legitimately can’t tell the difference. I don’t like leaving things unexplored, and I’d already signed up for a 10K - why not take the Lumen for a spin and see if using it could help me run a better race? What’s new, how it works, and scienceĪ lot has changed since I reviewed the first-gen Lumen, but some things are exactly the same.
Maybe I’d fueled incorrectly in the weeks leading up to the race. I know now that race wasn’t meant to be, but at the time, I was convinced I’d done something wrong.
That, and I’d just royally botched the New York City Half Marathon. I first reviewed this thing three years ago, but I decided to revisit the device a few months ago after Lumen reached out to say the product had undergone some major updates. Diet culture alone is a $71 billion industry, while the fitness industrial complex is worth $30 billion. These are three issues that pretty much anyone would love to fix, and the numbers prove it. It sounds too good to be true for one device to do all three. Armed with that data, you can theoretically take a more informed approach to losing weight, enhancing your athletic performance, or improving your overall metabolic health. The pitch is that you can learn how efficiently your body switches between burning fats and carbs. In the crudest terms, Lumen is a metabolism breathalyzer and digital nutritionist rolled into one. Once that’s done, it then spits out a customized plan for what I should eat that day. A few seconds later, the Lumen app on my phone tells me whether I’m burning fat, carbs, or a mix of both. I suck in a deep breath through this thing for four seconds, hold my breath for 10 seconds, and then breathe out for six seconds. For the past 12 weeks, the first thing I do when I wake up is roll over, grab my $349 carb vape, head to the couch, and begin my morning measurement. Lumen is essentially a metabolism breathalyzer, and yes, it looks like you’re vaping when you use it. If you buy something from a Verge link, Vox Media may earn a commission.
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Before coming to The Verge, she worked for Gizmodo and PC Magazine. By Victoria Song, a writer focusing on wearables, health tech, and more with 11 years of experience. I got results when trying to improve my athletic performance, but it took time, dedication, and a lot of patience with macro logging. Lumen review: a metabolism breathalyzer for the patient
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