After years of trying, I finally found a way to shift that stubborn layer of belly fat – the Lumen device. So keep reading for my full Lumen metabolism tracker review.
I’ve always had questions when it comes to my metabolism. Is it slower than everyone else’s, or am I just eating the wrong foods?
For the best part of 10 years, I’ve been weight training consistently, playing football twice a week, and going on long dog walks with my furry little best mate.
And while I’ve got no qualms about the muscle I’ve built in the process, there has always been a stubborn layer of fat I’ve never quite been able to shift.
I’m no expert dietitian, but I’d say my diet has been fairly clean for the most part. I mean, I have the odd cheat meal now and then, but who doesn’t?
After a decade of confusion, my quest for answers led me to Lumen. For those of you who aren’t familiar with Lumen, it’s the world’s only handheld metabolic tracker that helps people gain insights into their metabolism.
Everything I read online seemed positive, so I thought, why not give it a go? With that in mind, here’s my Lumen metabolism tracker review.
Oh, and before we start, it’s worth noting that you can save £50 on your Lumen device by using code GYM at the online checkout.
Lumen Metabolism Tracker Review: The Unboxing
I have to say, the idea of Lumen is pretty darn cool. I can get detailed feedback on everything from my sleep to nutrition just by blowing into a device? Take my money already.
When the package arrived, I was immediately impressed by how sleek and well-designed the Lumen tracker is.
It’s small enough to fit in the palm of your hand, and the set-up was straightforward. All you need to do is download the Lumen app, sync it with the device, and you’re good to go.
What struck me straight away was how user-friendly Lumen is. No complicated instructions or confusing tech jargon – just a simple system that tracks your metabolic state with a single breath.
You just huff into the device, and within seconds, it tells you whether you’re burning carbs or fat. Simple as that.
Lumen Metabolism Tracker Review: Understanding My Insights
After using Lumen for a few days, I was amazed at how much I learned about my body. My previous routine was just a mash-up of all the fitness tips I’d absorbed over the last decade, so having access to a full dashboard of data all about me was next level.
It revealed things I had no clue about, like how my metabolism reacts to different foods, what time of day I should be eating, and even how well I’m resting.
The real-time data allowed me to see whether I was burning fat or carbs at any given moment, which helped me adjust my meals and training accordingly.

One thing I’ve always struggled with is whether or not to eat before hitting the gym in the morning. I hate training on an empty stomach because I can never tell whether I’ll run out of juice halfway through the session.
With Lumen, I’d wake up in the morning, check my metabolic state, and then decide whether I needed a small snack before heading to the gym.
If I was in fat-burning mode and had a big cardio session planned, I’d get a banana down the hatch and crack on. If I was still topped up from a carb-heavy meal the night before, I’d know not to bother.
So far, so good in this Lumen metabolism tracker review.
Lumen Metabolism Tracker Review: Righting the Wrongs
As someone who prides myself on being bang into fitness, it was pretty humbling to find out how many mistakes I was making during this Lumen metabolism tracker review.
While they weren’t catastrophic, little errors like eating too many carbs late at night, not giving my body enough time to switch into fat-burning mode, and overdoing it on portion sizes were the snags hampering my progress all along.
Subtle differences that, without Lumen, would have been much harder to fix. I had the data and, thanks to the ongoing subscription, the advice on how to mend them.

Reducing my carb intake? Done. Adjusting meal times? Easy. It was like having a cheat sheet to my body, and the further I got through this Lumen metabolism tracker review, the more I began to value it.
See, I could have doubled up my sessions in the gym to shift that stubborn layer of fat, pouring significantly more effort and time into the whole debacle.
Or, I could carry on living the balanced, active lifestyle I already was – just making some little adjustments to bring everything into sync. And it was Lumen that made that possible.
Lumen Metabolism Tracker Review: The Results So Far
After a few weeks of using this device for my Lumen metabolism tracker review, I’ve noticed some impressive changes.
First off, my energy levels have been more consistent throughout the day, which I’m putting down to the improved diet and metabolic flexibility the tracker helps build.
I’ve also been able to better control my body fat levels, something I’ve always struggled with. The most significant change, though, is the peace of mind I now have about my metabolism.
Instead of guessing what my body needs, I now have the data to make informed decisions about what I eat and when I exercise.
And the best part? That stubborn layer of fat I’ve been battling for years has finally started to shift. It’s not a quick fix, but I’m definitely seeing progress that feels sustainable and healthy.
No crash diets or silly fads that I know I won’t stick to – just small, smart changes that are here to stay.
Lumen Metabolism Tracker Review: The Verdict
If you’re someone like me who’s been on a fitness journey for years and still feels like something is missing, then the Lumen metabolism tracker could be the key to unlocking your true potential.
It’s not just a gimmick – it’s a genuinely helpful tool for understanding and optimising your body’s unique metabolic needs.
With real-time data and personalised insights, Lumen has helped me take the guesswork out of my diet and training. And with the special offer of £50 off using the code GYM, it’s definitely worth giving it a try.
Head to Lumen’s website and grab your own device today. Trust me, it could be the game-changer you’ve been looking for.
READ MORE: Introducing Lumen: The Ultimate Handheld Intermittent Fasting Calculator