The Molecular Fitness Blood Test™

VO Health's flagship blood test of VO2 Max

VO Health's flagship blood test of VO2 Max

Uncover the molecular pathways driving your VO2 Max, fitness and health. Uncover how molecular pathways like inflammation, fat metabolism and oxidative stress impact your performance.

Uncover the molecular pathways driving your VO2 Max, fitness and health. Uncover how molecular pathways like inflammation, fat metabolism and oxidative stress impact your performance.

Partner rate

Offer your customers a preferred price

$179

$399

Self-collection blood testing kit

Prepaid return shipping

Comprehensive molecular lab analysis

Full report & insights

On-demand support from VO Health's scientists

First test

Reserve your organization's spot on the waitlist for $1, receive a complimentary test.

$1

$1

Proceed to Stripe - $1

Proceed to Stripe - $1

Proceed to Stripe - $1

Tests will be shipped to you with the next available batch.

VO Health's Flagship Blood Test

The Molecular Fitness Blood Test™ puts gold-standard VO2 Max testing into a simple, at-home blood test. It goes beyond oxygen alone to estimate and map the unique molecular signatures of fitness from circulating proteins in the blood. 

Why VO2 Max?

VO₂ Max is the gold-standard of cardiorespiratory fitness - not only is it a core metric of endurance performance, it is also the best independent clinical predictor of all-cause mortality and chronic disease risk. Long considered a vital sign by the American Heart Association, VO2 Max is difficult, costly and time-consuming to measure using traditional testing methods.

VO Health has been on a mission to make laboratory-grade VO2 Max testing easy and scalable for athletes, clinicians, coaches and health enthusiasts to do throughout the year.

How we Built the test

Our Molecular Fitness Blood Test is Built on gold-standard lab measurement, deep proteomic profiling, and machine learning trained on thousands of human samples. Our dataset includes a wide range of individuals, ages 18-82, including Olympic rowers, marathon runners and cyclists to individuals in their late 70s living with chronic diseases, and everybody in between.

The result: a Molecular VO₂ Max estimate, a unique Molecular Fitness Score, and 10 biological pathway scores that sit underneath your scores - scores such as inflammation, fat metabolism, oxygen transport, oxidative stress.

a bunch of beads that are in the shape of a snake

3,500 gold-standard VO2 Max tests paired with resting blood
draws

VO's proprietary dataset spans ages 18–81 with VO2 Maxes from 13–76 ml/kg/min, from regular people to hybrid athletes and Olympians.

person riding a mountain bike

1,000 proteins measured per sample

Each blood sample is run through cutting-edge high-throughput proteomics technology that quantifies 1,000+ distinct proteins.

man in gray dress shirt holding black camera

Top 50 proteins in your report

Our model selects the 50 most strongly associated with fitness to estimate VO2 Max and the underlying molecular pathways.

What your results reveal

A complete picture of your biology, built from 50+ circulating proteins in the blood, unique to you.

A complete picture of your biology, built from 50+ circulating proteins in the blood, unique to you.

1

Molecular Fitness & VO2 Max Scores

Proprietary algorithms that measure your cardiorespiratory fitness from ~50 biologically-relevant proteins

1

Molecular Fitness & VO2 Max Scores

Proprietary algorithms that measure your cardiorespiratory fitness from ~50 biologically-relevant proteins

2

Molecular Fitness Pathways

An analysis of 10 unique molecular pathways that drive your fitness and explain what factors may be contributing, such as inflammation and macronutrient metabolism.

2

Molecular Fitness Pathways

An analysis of 10 unique molecular pathways that drive your fitness and explain what factors may be contributing, such as inflammation and macronutrient metabolism.

3

Healthspan & Performance Insights

How your molecular score relates to your functional capacity, long-term health outcomes and athletic performance goals.

3

Healthspan & Performance Insights

How your molecular score relates to your functional capacity, long-term health outcomes and athletic performance goals.

YOUR MOLECULAR FITNESS FINGERPRINTSAMPLE
10 biological pathways, measured from ~50 proteins in your blood.
InflammationAngiogenesisHormonal SignalingFat MetabolismTissue RepairCarb MetabolismOxidative StressProtein MetabolismMuscle & VascularOxygen TransportInflammationAngiogenesisHormonalSignalingFatMetabolismTissueRepairCarbMetabolismOxidativeStressProteinMetabolismMuscle &VascularOxygenTransport
Your profilePopulation average
MOLECULAR VO₂ MAX
57.3mL / kg / min
MOLECULAR FITNESS SCORE
88th percentile
Illustrative results from a sample Molecular Fitness Report™.

Process and timeline

From order to insights — here's exactly what happens after you reserve your kit.

Watch how collection works

WEEK 0

Self collection kit arrives

Collection kit ships to your home or location of choice

WEEK 1

5-minute self-collection. Prepaid return envelope shipped to VO Health's lab.

three clear beakers placed on tabletop

WEEK 2-5

Samples batched and shipped for analysis at our technology partner's laboratory.

financial newspaper with stock chart

WEEK 4-8

Full molecular fitness report delivered to your inbox.

person in blue long sleeve shirt using black Surface

WEEK 8+

Meet with VO Health's health and performance scientists to help you understand your results.

RETEST

Recommended every 1, 3, or 6 months.

WEEK 0

Self collection kit arrives

Collection kit ships to your home or location of choice

WEEK 1

5-minute self-collection. Prepaid return envelope shipped to VO Health's lab.

three clear beakers placed on tabletop

WEEK 2-5

Samples batched and shipped for analysis at our technology partner's laboratory.

financial newspaper with stock chart

WEEK 4-8

Full molecular fitness report delivered to your inbox.

person in blue long sleeve shirt using black Surface

WEEK 8+

Meet with VO Health's health and performance scientists to help you understand your results.

RETEST

Recommended every 1, 3, or 6 months.

WEEK 0

Self collection kit arrives

Collection kit ships to your home or location of choice

WEEK 1

three clear beakers placed on tabletop

WEEK 2-5

financial newspaper with stock chart

WEEK 4-8

person in blue long sleeve shirt using black Surface

WEEK 8+

RETEST

Pricing

Preferred pricing for beta launch partners, with on-demand trainings and interpretation support.

Have more questions?

Get in touch

Partner rate

Offer your customers a preferred price

$179

$399

Self-collection blood sample kit

Prepaid return shipping

Comprehensive molecular lab analysis

Full report & insights

On-demand support from VO Health's scientists

First test

Reserve your organization's spot on the waitlist for $1, receive a complimentary test.

$1

$1

Proceed to the $1 Stripe hold

Proceed to the $1 Stripe hold

Proceed to the $1 Stripe hold

Tests will be shipped to you with the next available batch.

Frequently asked questions

When will I receive my results?

During our beta phase, results are delivered within 4–8 weeks of receiving your sample. We're actively optimizing our operations and expect to significantly reduce turnaround time in the coming months.

Does using the Tasso blood collection device hurt?

The Tasso device is designed for a comfortable, painless experience — most users feel little to nothing during collection.

How does this test compare to other VO₂ Max measurements?

Our test is the most accurate blood-based measure of VO₂ Max that currently exists. While grounded in gold-standard maximal VO₂ Max data, it measures fitness in a fundamentally new way, and we recommend that you treat it as its own unique lens rather than a direct comparison to a treadmill test or smartwatch.

How often should I retest?

We recommend testing at least 1–2 times per year, though you can retest as frequently as monthly to track changes in your fitness over time.

What if my score is different from my VO₂ Max exercise test and/or smartwatch estimate?

That's completely expected. This test measures proteins in your blood rather than cardiovascular output, so a direct comparison isn't the right frame. Think of it as a new dimension of fitness data — one that complements your other metrics rather than competing with them.

What does "beta" launch mean?

Our test is currently in its beta phase, which means it is the first live version of our algorithms that have been released. We are actively updating and improving our algorithms as we receive and analyze new data and insights. This test and report is intended to assist you in maintaining and encouraging a healthy lifestyle, and is not intended to diagnose, treat, cure, or prevent any disease or medical condition. The physiological values contained in this report are not provided for medical or clinical purposes. Consult a qualified healthcare provider before making any health-related decisions.

When will I receive my results?

During our beta phase, results are delivered within 4–8 weeks of receiving your sample. We're actively optimizing our operations and expect to significantly reduce turnaround time in the coming months.

Does using the Tasso blood collection device hurt?

The Tasso device is designed for a comfortable, painless experience — most users feel little to nothing during collection.

How does this test compare to other VO₂ Max measurements?

Our test is the most accurate blood-based measure of VO₂ Max that currently exists. While grounded in gold-standard maximal VO₂ Max data, it measures fitness in a fundamentally new way, and we recommend that you treat it as its own unique lens rather than a direct comparison to a treadmill test or smartwatch.

How often should I retest?

We recommend testing at least 1–2 times per year, though you can retest as frequently as monthly to track changes in your fitness over time.

What if my score is different from my VO₂ Max exercise test and/or smartwatch estimate?

That's completely expected. This test measures proteins in your blood rather than cardiovascular output, so a direct comparison isn't the right frame. Think of it as a new dimension of fitness data — one that complements your other metrics rather than competing with them.

What does "beta" launch mean?

Our test is currently in its beta phase, which means it is the first live version of our algorithms that have been released. We are actively updating and improving our algorithms as we receive and analyze new data and insights. This test and report is intended to assist you in maintaining and encouraging a healthy lifestyle, and is not intended to diagnose, treat, cure, or prevent any disease or medical condition. The physiological values contained in this report are not provided for medical or clinical purposes. Consult a qualified healthcare provider before making any health-related decisions.

When will I receive my results?

During our beta phase, results are delivered within 4–8 weeks of receiving your sample. We're actively optimizing our operations and expect to significantly reduce turnaround time in the coming months.

Does using the Tasso blood collection device hurt?

The Tasso device is designed for a comfortable, painless experience — most users feel little to nothing during collection.

How does this test compare to other VO₂ Max measurements?

Our test is the most accurate blood-based measure of VO₂ Max that currently exists. While grounded in gold-standard maximal VO₂ Max data, it measures fitness in a fundamentally new way, and we recommend that you treat it as its own unique lens rather than a direct comparison to a treadmill test or smartwatch.

How often should I retest?

We recommend testing at least 1–2 times per year, though you can retest as frequently as monthly to track changes in your fitness over time.

What if my score is different from my VO₂ Max exercise test and/or smartwatch estimate?

That's completely expected. This test measures proteins in your blood rather than cardiovascular output, so a direct comparison isn't the right frame. Think of it as a new dimension of fitness data — one that complements your other metrics rather than competing with them.

What does "beta" launch mean?

Our test is currently in its beta phase, which means it is the first live version of our algorithms that have been released. We are actively updating and improving our algorithms as we receive and analyze new data and insights. This test and report is intended to assist you in maintaining and encouraging a healthy lifestyle, and is not intended to diagnose, treat, cure, or prevent any disease or medical condition. The physiological values contained in this report are not provided for medical or clinical purposes. Consult a qualified healthcare provider before making any health-related decisions.

This test and report is intended to assist you in maintaining and encouraging a healthy lifestyle, and is not intended to diagnose, treat, cure, or prevent any disease or medical condition. The physiological values contained in this report are not provided for medical or clinical purposes. Consult a qualified healthcare provider before making any health-related decisions.