Take control of your health with Lumen

Lumen is a portable device and app that helps you improve your metabolic health. Through the breath, see how your metabolism responds to the food you eat, and know what to do about it to meet your goals. Lumen's metabolic tracking, personalized nutrition and lifestyle insights will help train your metabolism to convert the food you eat into energy more efficiently.

Lumen's nutrition method

Lumen encourages behavioural change that leads to a healthier lifestyle. Through daily measurements and insights, your employees will learn how to improve their metabolism for lasting results.

Getting to know you

Lumen is calibrated to your unique CO2 range and lung capacity.
screenshot from lumen metabolism trackers mobile app - calibration day

Taking a morning breath

Each morning, Lumen determines the source of your body's fuel – carbs or fats, by measuring the concentration of CO2 in your breath. This measurement shows how your metabolism responds to the food and lifestyle choices you made the day before.
screenshot from lumen metabolism trackers mobile app - unlock day

Receiving your plan

Based on your measurement, Lumen provides personalized nutrition recommendations and daily guidances on sleep, diet, exercise to meet your goals. Throughout the day, you can log your activity and check in before and after workouts to see how your metabolism responds to the food you eat.
screenshot from lumen metabolism trackers mobile app - results

Improving Metabolism

Over time, Lumen provides a Flex Score, which represents how efficient your metabolism is at using body fats or carbs as a source of energy, and is an indicator of general metabolic health.
screenshot from lumen metabolism trackers mobile app - unlock day

Benefits of joining the study

Lumen is looking for candidates to take part in a new clinical trial. Lumen's science and accuracy as a metabolic measurement device has been validated in multiple studies. Now, we are conducting a study at Sourasky Medical Center (Ichilov) in Tel Aviv, Israel. As a participant, you will receive:
A free Lumen device *
* in case of improvements in the metabolic measurements
A free Lumen coach to help guide you through the study
A smart scale for the duration of the study
An opportunity to improve your diet habits and become a better version of yourself

About the study

The study will be conducted over the course of 12 weeks and requires daily Lumen measurements, blood tests at the beginning and end of the study, and weekly weight measurements.


  • Android or iOS phone and basic understanding of technology
  • Basic English
  • Age 25-55
  • BMI ≥ 27 to ≤ 40 (check your BMI here)
  • Fasting blood Glucose of 100-125 mg/dL (if known)
  • HbA1c levels of 5.8 - 6.4 % (if known)
  • Diagnosed with prediabetes in the last 6 months
  • Currently and for the last 3 months not on any diabetes or diabetes related medications
  • Ability to spend several hours at the Sourasky Medical Center multiple times throughout the study

Contact us.

Dr. Asaf Buch:
Email: asafbu@tlvmc.gov.il