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Hack your metabolism & lose weight


Lumen is a device and app that measures your metabolism through the breath. In a single breath, see if your body is burning fats or carbs for fuel. With the app, you will receive daily personalized meal plans to help you lose weight and optimize your workouts.

Would you recommend this product?

I first heard about this product a few years ago, but declined to participate in the initial trial because I was a wuss. After hearing about the power of the platform, I'm regretting that choice. Bur it's never too late to start getting healthy!


This is one of the coolest ideas I've seen in a long time, and coming from a team who knows their way around the space.


I'll miss my pizza, but now at least I'll know when it's to enjoy it!

Thanks Jon, we look forward to having you as part of the Lumen Community. FYI, You don't need to say goodbye to Pizza, it's just about knowing when is the right time to have it according to your body and goals.

Waiting for availabilty yay


Amazing idea it looks


None there are none.

Hey Marc, Thanks, I'm sure you will enjoy Lumen, looking forward to welcoming you onboard.

Very useful companion. And it works!


Unique data



Lets us know if you have any questions. thanks!
Self employed

I am going to get it!


Definitely! Sounds amazing to be able to find out what foods are making you gain or not


you must use it all the time before you eat

The wait for this very promising and impressive device is far too long already. Happy to change my rating to 5stars, but in order to do that, you need to be able to actually have the device and use it. So far, seems only 4 backers got it, since last Thursday (?) but still no photos of them unboxing, no reviews-feedback-comments from them using it. Conclusion : a very generous 2.3m$ crowdfunding since last year and another 7m$ private funding since last year too, and so far we know (from Lumen) only 4 people that actually holding a box in a photo. So still waiting...
Tryer of all diets
Biggest rip off. I waited 18 months for this and yes you can breathe into it to find out if you’re burning fats, carbs or a mix, but the food planning (written by some unqualified nutritionist with no taste buds) is just a mix of keto and carb cycling. Stick to buying the cheap chemist urine analysis sticks and save yourself a fortune. There’s no planning available you just have to breathe in the morning and hope that you have their random foodstuff in your fridge. Hopeless