Are You Metabolically Healthy? Here's How To Find Out
P.S. It's nurse-approved.
Image by PeopleImages / iStock November 26, 2025 We carefully vet all products and services featured on mindbodygreen using our Our selections are never influenced by the commissions earned from our links. It's easy to believe that a slow metabolism is just genetics (and there's not a lot you can do about it). After all, only 12% of the American population is estimated to be metabolically healthy. This smart metabolism tracker uses daily CO2 readings to provide real-time insights into how your metabolism is operating. It then gives actionable insights to optimize your metabolism. And while this nurse-approved device typically costs $599 per year, you can snag it for just $299 for the year right now in Lumen's Black Friday sale. Lumen Metabolism Tracker $299 (was $599)

How the Lumen device works
First things first, it's important to remember that metabolism is a complex process. It reflects how your body transforms food into energy and waste—which then supplies our bodies with energy for vital functions.
Your metabolism impacts how quickly (and efficiently) your body can burn calories and convert carbohydrates, fats, and protein into energy.
So, where does the Lumen come in? While metabolism is flexible, your goal is to burn fat in the morning, transition to carbohydrates in the evening, and then return to fat-burning mode before bed.
By analyzing the concentration of CO2 in your breath, the Lumen device can determine whether your body is using carbohydrates or fats for energy. It can then provide real-time recommendations on how to eat that day to optimize your metabolism.
With regular use, it's possible to tweak your diet, sleep, and activity until your metabolism readings align with Lumen's recommended cycle.
What testers say
"As a nurse and a woman who has struggled with weight loss and a slow metabolism her whole adult life, trying Lumen was eye-opening and validating. Combining modern technology with time-tested nutrition science, it provides a unique approach to understanding and managing your bodily functions. Of course, as with any lifestyle change, making a habit in a short amount of time can be tricky."
Of course, you don't need to be a medical professional to benefit from the Lumen tracker. The informative device has more than 3,000 reviews from real customers—and they say it's an essential tool for accountability and education.
What other users say:
Lumen Metabolism Tracker
$299 (was $599)

The takeaway
If you're struggling to optimize your metabolism, the Lumen tracker is your ultimate hack. The handheld device makes understanding metabolic flexibility less complicated by providing actionable steps to set you up for success. And right now you can score a device for just $299 in Lumen's Black Friday sale.
JaneWalter 