The test
About 10 minutes
You sit comfortably and breathe normally into a sterile, single-use mouthpiece while the analyzer samples your expired air. No blood draw, no exercise, no discomfort.
KORR metabolic analyzer
Stop estimating your metabolism. Measure it.
Online calculators guess your calorie needs from height, weight and age. The KORR metabolic analyzer measures them — using indirect calorimetry to read your oxygen consumption and calculate your true resting metabolic rate in about ten minutes of quiet breathing.
The science
What resting metabolic rate tells us.
Your resting metabolic rate (RMR) is the energy your body spends simply staying alive — typically 60–75% of everything you burn in a day. Because oxygen consumption is directly proportional to calories burned, measuring the oxygen you extract from each breath gives a physiological number rather than a population average.
Predictive equations can miss an individual's real RMR by hundreds of calories in either direction. That gap is often the whole difference between a plan that works and a plan that stalls.
- Set a calorie and protein target based on measurement, not a formula
- Confirm whether metabolism has adapted after repeated dieting
- Track metabolic rate through GLP-1 therapy to protect lean mass
- Explain stubborn plateaus and unexpected weight regain
- Screen for a slow metabolic rate worth investigating further
Your results
Same visit
You leave with your measured RMR, an estimated total daily energy expenditure based on your activity, and calorie and protein targets for fat loss, maintenance or muscle gain — reviewed with you line by line.
Retesting
Every 8–12 weeks
Metabolic rate shifts as weight, muscle and medication change. Repeat testing during GLP-1 therapy shows whether you are losing fat while defending metabolism.
Before your test
Five things that keep your result accurate.
- Fast for 4 hours — water is fine
- No caffeine, nicotine or supplements for 4 hours
- No exercise the morning of your test
- Arrive 10 minutes early and rest quietly before testing
- Bring a list of your current medications and supplements
Metabolic testing is an assessment tool, not a diagnosis. Results are interpreted alongside your history, labs and goals. Testing can be booked on its own or bundled with a weight management or gut health consultation.
Consent forms
Paperwork for your test
Metabolic testing only needs our general consent — bring it signed along with your medication list.
Pre & post-treatment instructions
What to do in the days before your appointment and how to care for your skin afterwards. Read this first, whatever you are booking.
PDF · 112 KBGeneral consent, privacy & financial policy
New-patient consent to evaluate and treat, HIPAA privacy acknowledgement, photography permission and the cancellation policy.
PDF · 46 KBTen minutes for a number that changes the plan.
Book KORR metabolic testing on its own or as part of your weight management visit.