Microlife BodyGem and MedGem Indirect Calorimeters –
A Simple Measurement for Effective Weight Management
The Microlife BodyGem and MedGem devices provide scientifically validated Resting Metabolic Rate (RMR) measurements using indirect calorimetry, the gold standard for determining energy needs.
Unlike estimation formulas such as Harris-Benedict or Katch-McArdle, which rely on averages and assumptions, the BodyGem and MedGem directly measure oxygen consumption (VO₂) to determine an individual’s unique Metabolic Fingerprint. This approach accounts for thyroid conditions, medications, metabolic adaptations, and other factors that can significantly impact energy expenditure.
The Academy of Nutrition and Dietetics (formerly ADA) recommends indirect calorimetry as the most accurate method for assessing individualized caloric needs in clinical and professional settings.
Why Choose Our Devices Over Estimation Formulas?
✔ More Accurate – Estimation formulas assume metabolic rates based on broad population averages, often leading to miscalculations of 20% or more. The BodyGem and MedGem provide precise, patient-specific data in minutes.
✔ Clinical & Research Validated – The devices have been validated against the Douglas Bag Method and compared with hospital metabolic carts (Sensormedics & Delta Trac), confirming their reliability and accuracy.
✔ Optimized Treatment Plans – By precisely measuring RMR, you can tailor nutrition, weight loss, and nutrition plans based on actual caloric needs, improving patient outcomes.
✔ Addresses Individual Variability – RMR is affected by age, muscle mass, medical conditions, medications, and metabolic changes (e.g., post-bariatric surgery, thyroid dysfunction). Only indirect calorimetry can account for these factors.
✔ Recommended for Healthcare & Fitness Professionals – Used in hospitals, bariatric clinics, sports medicine, corporate wellness, and elite athletic training centers worldwide.
How the BodyGem and MedGem Work
1️⃣ The patient breathes into the device for 5-10 minutes while seated in a relaxed state.
2️⃣ The device measures oxygen consumption (VO₂) to determine the precise caloric needs for maintaining metabolic function at rest.
3️⃣ The RMR value is displayed immediately on the device’s LCD screen.
4️⃣ Determine their Daily Calorie Budget with the Analyzer Software. RMR results can also be used without software to customize caloric intake for weight loss, maintenance, or medical nutrition therapy.
Easily generate reports: Print Client Measurement Summary Reports on standard paper or email them in PDF
What Sets Our Indirect Calorimetry Devices Apart
✔ Validated against The Douglas Bag Method and hospital-grade metabolic carts, the gold standard
✔ Portable, self-calibrating, and user-friendly
✔ Delivers results in under 10 minutes
✔ Uses comfortable, bite-wing mouthpieces to prevent air leaks
✔ Lower cost than other indirect calorimeters
✔ Lease Option available for all budgets
Key Differences: BodyGem vs. MedGem
For medical professionals, the MedGem is an affordable, FDA-cleared option for accurately determining RMR, allowing for insurance reimbursement and diagnostic use in hospitals, bariatric centers, and clinical research.
For non-clinical settings, the BodyGem offers the same accuracy but is an affordable, reliable option for accurately determining RMR. It is widely used by personal trainers, weight loss specialists, and dietitians to provide premium metabolic testing services.
* Resting VO₂ results are shown on MedGem LCD screen results to warrant insurance reimbursement, BodyGem measures resting VO₂ but does not show this number as it is not required by the FDA.
Elevate Your Services Above the Competition
Validation Studies and Case Studies
Explore the comprehensive validation and clinical studies supporting the accuracy, reliability and practical applications of our devices in various settings of our MedGem and BodyGem devices.
Trusted by Healthcare Professionals
Join the ranks of leading hospitals,
bariatric centers, military and VA facilities, universities and research institutions, fitness organizations and other healthcare professionals who trust our MedGem and BodyGem devices for precise metabolic rate measurements.
Global Leader in Medical Diagnostic Equipment
The BodyGem and MedGem indirect calorimetry devices are developed by Microlife Medical Home Solutions Inc., a division of Microlife Corporate. Microlife specializes in innovative solutions for both home monitoring and professional healthcare settings.
Military and VA Facilities
Marine Corps Semper Fit
Special Operations Command
James A Haley VA
Bariatric Care Centers and Health Providers
Kaiser Permanente
Central Ohio Nutrition Center
Northwestern Memorial
MetroHealth
Hospitals
Ochsner Health
Baptist Health
Renown Health
Miami Cancer Institute
Sports Performance
Ochsner Fitness Center
Cinncinati Reds
Wisconsin Athletic Club
Universities and Colleges
Virginia Tech
University of Washington
University of California San Francisco
Texas Southern University
COVID-19 Update
The MedGem and BodyGem filters are made with 3M Filtrete medical-grade material to ensure the highest standard of safety and performance.
For optimal hygiene and accurate results, a new mouthpiece filter and nose clip must be used for every measurement.
Important Precautions:
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Do not remove the flow tube—this could expose sensitive sensors that may be damaged by water or cleaning solutions.
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Avoid submerging the device in water or allowing any liquid to enter the display window, sockets, or flow tube openings.
For Questions, Orders, or Support:
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Call: 713-858-2445
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Email: nora.neely@microlifeusa.com
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Complete the online Contact Form for a response via email or phone
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To order a BodyGem or MedGem System Kit, complete the Order Form and call us with payment information
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Purchase orders accepted from companies with a net-30 credit account
Please note that our previous phone number (303-274-2277) and fax number (303-274-2244) have been discontinued. Kindly use the updated contact information provided above.
