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Lumen Device
Lumen empowers you to make smarter, personalised choices for your body by using your breath to measure your metabolism in real-time. Whether you're burning carbs or fats for fuel, Lumen offers insights that help you make informed decisions about your nutrition, fitness, and overall wellbeing.
In stock. Next day delivery available.
Buy now, pay later from £67.50/mo with
Free UK shipping over £50, free returns.
Key Benefits
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Get unlimited metabolic measurements in real time.
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Optimise fat burning potential and boost energy levels.
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Fuel your day with a personalised nutrition plan.
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Discover your optimal fasting window and know exactly when to break your fast.
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Take your athletic performance to the next level.
Lumen is a handheld device that measures your metabolism in real time by analysing the CO₂ levels in your breath. Using advanced sensors, it detects whether your body is burning carbohydrates or fat for fuel, giving you instant metabolic feedback. This insight helps tailor your nutrition and lifestyle choices, optimising your energy levels, fat-burning potential, and overall metabolic health.
With a Lumen membership, you'll receive tailored nutrition plans updated daily, macro tracking and meal suggestions, insights and recommendations for smarter habit formation, metabolic coaching and support, and integrations with Apple Health, Google Fit, and Garmin. Plus, the new AI food logging feature allows you to log meals using photo and voice recognition.
_What’s in the box:
Lumen device
Travel case
Charging dock and USB-C cable
Quick start guide
Instruction manual
Specifications:
Dimensions: 4.02 x 1.63 x 1.31 inches.
Weight: 95 grams.
Materials: Stainless steel mouthpiece and cover.
Battery: Lithium Polymer battery with up to 10 days of charge (depending on daily usage)_
Lumen’s mission is to create a world where everyone has access to personalised nutrition and lifestyle guidance that supports metabolic health, empowering individuals to improve their health through cutting-edge technology. They offer a state-of-the-art metabolism tracker that provides real-time insights into metabolic health, helping users optimise their nutrition and wellness. With values of transparency, honesty, and integrity, Lumen is committed to providing science-backed solutions that prioritise long-term health. The brand also fosters a culture of teamwork and inclusivity, with a passionate, diverse team working towards better health for all.
With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.
Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.
Shipping
At Healf, we prioritize safe and fast delivery for all our customers. Our carefully selected couriers are Royal Mail and DPD.
UK standard delivery
Enjoy free standard delivery on orders above £50, this option usually requires 2-3 working days. If your order is under £50, this delivery option is available for £3.99.
Next working day
For when you need our products urgently, we offer next working day shipping for £5.99. For orders placed before 12.00, we will ship it the same day to ensure you receive your order the next working day.
International
International deliveries can take 7 working days, and up to 4 weeks. The cost is £22.99 for orders below £50, £49.95 for orders above.
Returns
If for any reason you are not satisfied with your order, we provide free 365-day UK returns for all our customers. To initiate your return, simply contact us at team@healf.com, and we'll send you a return slip and help arrange a collection. The item you return must be sent in the same condition as received and inside the original packaging. Once received, we will notify you via email.
For international returns, we unfortunately do not cover the cost. However, we work with an array of carriers and can offer self-posting returns for customers shopping from outside the UK.
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Frequently asked questions
Every product undergoes our Healf Curation Process. With it, you can shop confidently knowing that every item has been tried and tested before it reaches you. Our Healf Curation Process includes three key steps: Brand Discovery, Expert Validation, and Community Testing. Through these, we assess quality, ingredients, effectiveness, and more, ensuring that every product empowers your wellbeing.
The Healf Journal offers detailed insights into different aspects of wellbeing, as well as guidance, research, recipes, and more to help you invest in your personal wellbeing journey. You can also subscribe to our weekly newsletters for the latest updates at Healf and in the wellbeing industry. Subscribe via the sign-up block at the bottom of this page.
We love people who check ingredients as carefully as we do, so you'll find detailed information about the ingredients used on every product page (where applicable). If you see something you'd like to flag with us or have additional questions, please don't hesitate to get in touch—we'd love to hear from you.
New
New
Translate your body’s data
into a personalised
wellbeing plan.
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Healf Curation
Process™
Every product undergoes our rigorous Healf Curation Process, ensuring you are always getting the best when it comes to your wellbeing.
Discover more
The Discovery
Expert Validation
Community Testing