Nutrition & Health Consulting
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MedGem® Metabolic Testing

The MedGem® indirect calorimeter is a FDA 510K-cleared Class II medical device that accurately measures oxygen consumption (VO2) to determine resting metabolic rate (RMR)*.  Your RMR is the amount of calories (energy) your body uses each day without activity. RMR varies from person to person. Getting your RMR measured can provide important information to help you achieve your nutrition and weight goals.

The MedGem® measurement is easy to obtain and takes only 5-15 minutes to provide your individualized RMR results!  You will sit in a quiet and relaxed environment wearing a nose clip and breathing into a mouthpiece.

You will be provided with a verbal and written explanation of your results. This service can be completed with or without nutrition counseling.

Accuracy of the test depends on your ability to follow certain preparation instructions. You will need to arrive to the office and relax for 10-15 minutes before the test is performed in addition to the following guidelines on the day of the appointment.

  • Do not consume any food product for four hours prior to your appointment.
  • Do not consume any caffeinated beverages (coffee, soda, energy drinks, etc.) for four hours prior to your appointment. Water is OK!
  • Do not perform any strenuous (i.e. strength training, vigorous running, etc.) activities for four hours prior to your appointment.
  • No tobacco and nicotine containing products for one hour prior to appointment.
  • No nutrition supplements containing stimulants such as ephedra, ma huang, guarana, herba mate etc.
  • No decongestants or diet pills.
  • Continue taking all prescribed medications as indicated.
Measurements should be re-taken when there is a change in medical condition, you have lost approximately 5-10% of your body weight, you have had a weight loss plateau, or over time with aging.


Please see/click on our RATES SCHEDULE for details.

Payment is due at time of service. We have a 24 hour cancellation policy or you will be charged the full amount of your appointment visit. We accept cash, check, major credit cards, and PayPal.

*RMR is calculated using the Weir equation and a constant RQ value of 0.85 (RMR=6.931xVO2), Weir, J.B., New Methods for Calculating Metabolic Rate with Special Reference to Protein Metabolism. J Physiol, 1949. 109:pages 1-9.

Watch the video to see the MedGem® in action on The Biggest Loser television program.


The contents of the Eat Fit Health site are for informational purposes only. The content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on the Eat Fit Health site.


Eat Fit Health offers boutique nutrition and health consulting services located in suburban Philadelphia and nationwide. We work with individuals, groups, and companies who need customized services in the nutrition and health field.