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Lumen Device
The world’s first handheld metabolism tracker that shows how your body burns fuel in real time. Lumen uses clinically validated technology to bring lab-level metabolic insights from the comfort of your own home.
£269.99
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.
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Helps optimise fat burning and energy levels.
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Personalised insights on nutrition and daily habits with real-time biofeedback.
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Portable and lightweight with up to 10 days battery life.
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Scientifically validated to provide lab-level accuracy in a handheld device.
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.
Lumen connects to an app that provides personalised meal plans, macro tracking, and metabolic coaching. With daily breath measurements, you can monitor how food, sleep, and exercise impact your metabolism. The device is portable, lightweight, and designed for everyday use. Its long-lasting lithium-ion battery provides up to 10 days of use on a single charge.
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
Lumen’s mission is to create a world where everyone has access to personalised nutrition, 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.
The CO2 concentration is measured using a unique breath maneuver, which is performed by inhaling a fixed volume of air through the Lumen device (dynamic to each individual), holding it for 10 seconds, and exhaling fully.
Lumen is for anyone looking to improve their metabolic health, manage their weight, boost their energy levels, support their workout routine, and live happier and longer lives.
If you are under 16 years of age, pregnant, breastfeeding, or suffer from the following conditions, please consult a medical professional before using Lumen:
Diabetes Severe asthma COPD
Additionally, Lumen's nutritional recommendations may not be suited for people with: Kidney disease Cancer Thyroid disorder For other medical problems, please check with your doctor first.
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).
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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.
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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.
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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.
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The Discovery
Expert Validation
Community Testing