Find the answers basic labs never gave you

Beyond trial and error
Supplements, diets, and quick fixes only scratch the surface. Function measures 100+ advanced biomarkers to uncover what’s really driving your symptoms.
Replace frustration with clarity
Tired of guessing? Get a clearer picture of your metabolism, hormones, recovery potential, and inflammation so you finally know what needs attention.
Your clearest path forward
Spot signals early, get actionable steps, and take control of your health, without wasting energy on things that don’t work.
Get personalized insights

Stop guessing, start knowing

“Normal” labs often leave you without answers. Function goes deeper, testing 100+ biomarkers to give you a more detailed picture of your health, and actionable next steps. Because you deserve real solutions, not another quick fix.

Test your levels
Apolipoprotein B (ApoB)
LDL Particle Number
LDL Peak Size
Total Cholesterol / HDL Ratio
Hemoglobin A1c (HbA1c)
Insulin
Thyroid-Stimulating Hormone
Thyroxine (T4) Free
Triiodothyronine (T3) Free
Thyroid Peroxidase Antibodies
Potassium
Estimated Glomerular Filtration Rate
Albumin
Lipase
Multi-Cancer Detection Test
Prostate Specific Antigen (PSA) %, Free
Rheumatoid Factor
Antinuclear Antibodies Screen
High-Sensitivity C-Reactive Protein (hs-CRP)
Vitamin B12
Folate
Estradiol, Female
Testosterone, Free, Male
Alanine Transaminase

Your membership

Annual Test
100+ Lab Tests
The Yearly is the most comprehensive set of tests. Repeats annually. No hidden fees. No insurance involved.
Mid-Year Test
60+ Lab Tests
The Mid Year is between yearly tests, often 3-6 months later. Compare with past results to monitor changes.
On-Demand Tests
Menu of advanced tests
Access as needed to focus on specific areas, or test everything again. Easy with transparent, competitive prices. Additional costs apply.

What could cost you $15,000  is $499

Function Membership
It's time you own your health.
$42 
/month
Charged annually at $499
100+ lab tests yearly
The full cost of testing is included.* With advanced tests typically not covered by insurance. 5x more tests than an avg physical.
Doctor insights / Clinician’s summary
Get insights from top doctors and 1000s of hours of research based on your results. Read your Clinician’s Summary written by our clinical team after every test.. Clinicians call you promptly if any urgent results arise.
Lifetime tracking of results
Results charted over time in one secure place for easy access. Share with doctors anytime.
Testing at Quest Diagnostics
Over 2,000 locations around the US. Lab visits average 15 min.

Testing is easy

Step 1
Instantly schedule lab tests
Secure a time slot at one of 2,000+ Quest Diagnostics locations around US
Step 2
Lab visits average 15 minutes
Function includes the cost of two lab visits per year with 100+ biomarkers.
Step 3
Powerful results
Monitor for early signs of disease. Find out where and how to improve.

Take charge of your health starting with knowledge

What does a Function membership include?
Who needs Function?
How does Function keep my information safe?
Is insurance involved?