Microlife BodyGem and MedGem indirect calorimeters

Microlife BodyGem Compared To Lumen Metabolic Device

This page compares the Microlife BodyGem indirect calorimeter with the Lumen metabolic device, so that you can see the differences.

What do the Microlife BodyGem and Lumen device measure?

Microlife BodyGem Indirect Calorimeter measures RMRThe BodyGem indirect calorimeter measures resting VO2 to determine a person’s Resting Metabolic Rate, RMR, which is the number of calories a person would burn if they sat in a chair all day.

RMR is typically between 65-75% of a persons’ Daily Calorie Expenditure, depending on activity levels.

A bariatric doctor, dietitian and personal trainer can use the BodyGem Analyzer software to map out a customized Daily Calorie Budget.


Lumen device compared to the BodyGem indirect calorimeter.The Lumen device uses a CO₂ sensor and flow meter to measure Respiratory Exchange Rate (RER).

Determining the CO₂ concentration lets a person know if they’re burning carbs or fats for energy.

A bariatric doctor, dietitian and personal trainer can track their clients readings from the Lumen device, to monitor their progress and make adjustments.

Why measure with a Microlife BodyGem and Lumen device?

The BodyGem indirect calorimeter and Lumen device provide different information.

A bariatric doctor, dietitian and personal trainer could utilize both in their practice. They would measure a clients RMR with the BodyGem and use the Analyzer software to determine a personalized Daily Calorie Budget.

Then they could have their clients use the Lumen device to track the type of calories that they are burning to customize the ratio of proteins, carbohydrates and fats, to achieve optimal results.

Who is the target customer for the Microlife BodyGem and Lumen device?

The Microlife BodyGem indirect calorimeter is designed for bariatric doctors, dietitians and personal trainers to use to measure their clients RMR.

The Lumen device is designed for individuals to monitor the type of calories they’re burning. It is not designed for Bariatric doctors, dietitians and personal trainers to measure their client’s RER, but they can monitor their clients data to provide feedback.

What are the costs for the Microlife BodyGem and Lumen device?

The BodyGem indirect calorimeter is $2,799. Microlife also offers a FDA-cleared MedGem device @ $3,499 for practitioners who want to make insurance claims. The kits come with a 21-pack of mouthpiece filters and nose clips, Analyzer software for Windows and a lightweight carrying case. 21-packs of mouthpiece filters and nose clips are $299. 63-filter value-packs of filters are $598, saving you 33%.

The Lumen device is normally $299. It includes one free month of support membership which renews $19/month.


The Microlife BodyGem and MedGem indirect calorimetry devices measure your clients Resting Metabolic Rate, to optimize their weight loss results.

Instead of estimating RMR with the Harris-Benedict or Katch-McArdle formula, the BodyGem and MedGem scientifically measure a clients Metabolic Fingerprint, that is unique to them.

Estimation formulas cannot factor in thyroid issues, the effects of medications, etc.

For the best care, the American Dietetics Association recommends using indirect calorimetry to measure RMR for the most accurate assessment of nutritional needs.

The BodyGem and MedGem are the same type indirect calorimeter. They have the same functionality, accuracy and reliability.

The difference is that the MedGem is a FDA 510K-cleared, class II, medical device, which allows licensed clinicians to make insurance claims on their measurements.

CLICK HERE FOR A ONE-PAGE BODYGEM INFORMATION PRICING SHEET PDF.

CLICK HERE FOR A ONE-PAGE MEDGEM INFORMATION PRICING SHEET PDF.

Microlife BodyGem Indirect Calorimeter measures RMRThe BodyGem is designed for Personal Trainers, fitness facilities and Dietitians who don’t make insurance claims for their services.

Set yourself above your competition, by offering a higher level of care to your clients with a scientifically determined resting metabolic rate (RMR) measurement. To perform a measurement, your client simply breathes into the device, which measures their oxygen consumption (VO2) to determine their unique metabolic rate.

Measurement providers typically charge between $50-70 for a RMR measurement, so you can generate profits quickly.

A wide variety of health and fitness professionals use the BodyGem, to ensure accurate and reliable measurements for use in their weight management programs. CLICK FOR MORE INFO ON THE BODYGEM

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Microlife MedGem Indirect Calorimeter measures RMRThe MedGem is designed for Bariatric Doctors, Dietitians and other healthcare professionals who need an FDA-cleared medical device.

The MedGem displays both the RMR and Resting VO2 for patient diagnosis. Insurance reimbursement rates range from $60 – $80 in total reimbursement.  AMA CPT Information Services advises using CPT Code 94690 (oxygen uptake) as the primary code for the RMR measurement.

Medical professionals use the MedGem to ensure accurate and reliable measurements for use in their weight management programs. CLICK FOR MORE INFO ON THE MEDGEM

Why are the BodyGem and MedGem indirect calorimeters the best choice?

They have been validated against the gold standard Douglas Bag, and against the Sensormedics and Delta Trac hospital metabolic measurement carts.

Our indirect calorimetry devices are portable, self-calibrating, easy to administer, and provide a RMR reading on the LCD panel in 10 minutes or less.

They use bite-wing style mouthpiece filters to make measurements more comfortable for your client and to prevent air leaks.

You can print the Client Measurement Summary Report on regular paper, and you can email it to your client in PDF format.

They are lower priced than other indirect calorimetry devices, and we have Starter System Kits to fit almost any budget.

Get more information on the BodyGem and MedGem indirect calorimeters

Call 720-431-1461 to get your questions answered.

Or complete the CONTACT FORM and we will email you or call you.

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