Physician-founded · Bay Area

Know exactly how your body burns fuel.

Name: MetabAcheck
Rating: 5.0

RMR and VO2max Testing that measures your metabolism instead of estimating it — from a testing service founded and run by a physician with 25+ years of metabolic testing experience.

★

5.0 Google Rating

👨‍⚕️

25+ Years Experience

🏅

3,000+ Tests Completed

Why MetabAcheck

The test is only as good as the person reading it.

Most metabolic tests hand you a printout. Dr. Jay hands you a plan — backed by 25+ years of reading results and equipment that measures your metabolism directly.

Every result is personally reviewed and interpreted by a Dr. Jay!

Dr. Jay has personally analyzed 3,000+ metabolic tests, and he reads yours himself — line by line, not just a software printout. That interpretation is educational: his medical background is what makes the explanation rigorous and clear. He is not diagnosing or treating any condition.

Measured, not estimated

Indirect calorimetry via the Pnoē Gas Analysis System — the same measurement approach used in clinical and research settings — measures what your body is actually doing, instead of estimating it from a wearable or a bioimpedance reading.

Break plateaus

Many clients come after months without progress. Testing pinpoints the cause so you can adjust and move forward.

Fast & affordable

The RMR test takes ten minutes. For less than many gym memberships, you get answers that actually move the needle.

Works with any program

Keto, CrossFit, Weight Watchers, P90X — none were designed for your body. MetabAcheck makes any program personal.

Proven results

A gallery of former clients and athletes — weight loss, performance gains, metabolic repair. Whatever your goal, we've helped it.

Services

Three ways to understand your metabolism.

Resting (RMR) Metabolic Testing

Your exact resting calorie burn and fat-burning efficiency, measured by indirect calorimetry — not estimated from height, weight, or body fat percentage.

$170

and up

VO2max Fitness Testing

Heart rate zones, aerobic capacity, fueling, and 13 performance metrics for anyone (seniors, athletes, inactive) wanting to train with data, not guesswork.

$320

and up

Respiratory Muscle Training (RMT)

In-facility and at-home respiratory training to build respiratory capacity, improve recovery, and support fat loss. It also improves sleep quality, daily energy levels, and reduces stress.

$100

and up

3,000+

People Tested

1,000+

Slow Metabolisms Identified & Corrected

25+

Years, One Physician, Every Result

5.0 ★

Rating on Google

GOOGLE REVIEWS

What Our Clients Are Saying

MetabAcheck

5.0

Based on 26 reviews

Mark Fesen

2 months ago

My experience with Dr Jay and MetabAcheck was exemplary. Every detail was checked. I was highly impressed that my report of my VO2 studies was both accurate and inspiring. I plan to continue to come back and have a recheck in several months time. I was impressed with the time spent with me and the personal attention.

Ayden Winter

2 months ago

I did a Resting Metabolic Rate test with Dr. Jay and he explained some of the functions of the mitochondria, zone 2 exercise, and how those can impact attempts at weight loss. He was very thorough and his advice was very actionable. I was able to start to lose weight more easily than I ever could by following his advice. I went back to do the VO2 testing, to refine my zone 2 measurement, and learned even more about how my respiration is limiting my ability to do intense cardio. Dr. Jay is such a wealth of information, I would recommend his testing and services to anyone trying to strengthen their body and metabolism. I had no idea how such small things could make such a big difference. I’ll be back to do respiration coordination training with him. What he offers is really comprehensive and cutting edge.

Diana Moskowitz

4 months ago

So insightful! I can’t believe I’ve been training all these years without knowing this data before. I think this is great information to know at any level of fitness! This is not just for elite athletes. It’s a great way to make sure that your training appropriately for your body and to address any shortcomings without spinning your wheels. Highly recommend!

Tia Nowak

8 months ago

Dr. Jay was so incredibly helpful, super kind and great to work with. He did say upfront that if he were to just tell me my Vo2 max number that just knowing that wouldn’t give me much to go off of - After seeing all the other results and information from the testing, I can see why!! As an athlete and fitness professional, I really appreciated learning more about my results. I wouldn’t have expected some of them, to be honest. It’s just not your Vo2 max, but other info including your lung capacity and volume, your breathing, fat and carb burner, efficiency, and more! Great info and would definitely recommend, especially to those who are a competitive athlete or serious about making changes to their body and committed to it.

Robert Ortega

8 months ago

Dr Jay is fantastic.

Shonte Akognon

1 year ago

If I could give more stars I would. Not only do I feel like I have a more clear understanding of my current metabolic health, Dr. Jay took the time to make sure that all the information was explained to me in an easy to digest way. The RMR and Vo2 tests gave me eye opening data and Dr. Jay has made me feel more confident in steering my health back in the right direction. I’m so excited to take the tools and information I have learned and apply them and watch how much my health improves in the coming months!

Melinda Gutermuth

2 years ago

I visited Dr. Jay for an RMR test recently and all of my expectations were exceeded. I've struggled to set reasonable calorie consumption and exercise goals for the longest time because the standard calculations didn't seem right for my body. The test itself was very easy, and Dr. Jay explained every step of the process to make sure I got the most accurate results. The report I got back gave me so much valuable insight into how my body is using energy. I also appreciated all his recommendations for next steps, and look forward to using this information to really improve my long-term health and wellness.

Melanie Dalton

3 years ago

Dr. Jay is fantastic and I wish we would have found him years ago!! I have focused on health and wellness for many years now, doing my best to make adjustments as I went along, reading everything under the sun. The tests that Dr. Jay provides were incredibly informative and crucial to understanding my specific body needs; yet his deep dive into the reports and turn around of this information to understandable, actionable change is what is truly valuable. The information I received, I would not have been able to discover on my own. Further, without Dr. Jay’s interpretation of the data, I would not have made the accurate adjustments. Now I know that I am on the true best course to reach my fullest potential and health goals. Dr. Jay has an absolute wealth of knowledge and is truly passionate and excited about what he does, which shows in hs expertise and also the care and attention he provides to each individual (my husband has also gone through this process!). It is a great feeling to know we are truly on course this time and that we have Dr. Jay in our corner as we continue to progress. Thank you Dr. Jay!

Come visit us

Convenient Bay Area location

Ready to stop guessing?

Ten minutes. Real answers. A physician who actually reads your results.

Got a question first? Send us a message — we’ll get back to you directly.

Know exactly how your body burns fuel.

The test is only as good as the person reading it.

Every result is personally reviewed and interpreted by a Dr. Jay!

Measured, not estimated

Break plateaus

Fast & affordable

Works with any program

Proven results

Three ways to understand your metabolism.

Resting (RMR) Metabolic Testing

VO2max Fitness Testing

Respiratory Muscle Training (RMT)

What Our Clients Are Saying

Convenient Bay Area location

Ready to stop guessing?

MetabAcheck

Services

Pricing

More