Hormones & thyroid
16 Biomarkers
- Thyroxine (T4) Free
- Thyroglobulin Antibodies (TgAb)
- Testosterone, Total
- Anti-Mullerian Hormone
- Thyroid-Stimulating Hormone (TSH)
160+ lab tests
Total each year
Whole body
Tested 2x per year
$1 per day
$365 per year
Monitor early indicators of 1000s of diseases
Establish your long-term baseline
Tracked for life
Monitor how your body changes
AnemiaGoutCeliac diseaseAddison's diseaseInsulin resistanceFatty liver diseasePancreatic cancerOvarian cancerSickle cell diseaseSjögren's syndromeDiabetesRheumatoid arthritisMold toxicity
HypogonadismLupusCoronary artery diseaseHypothyroidismAlzheimer's diseaseHemochromatosisPCOSChronic kidney diseaseHashimoto's thyroiditisProstate cancerLead toxicityGraves' disease
160+ lab tests chosen by top doctors
“The most powerful approach I’ve seen in my career. Uncompromising depth with no shortcuts.”
Cancer & other silent risks
34 Biomarkers
- Galleri® Multi-Cancer Test
- Prostate Specific Antigen (PSA), Total
- Rheumatoid Factor (RF)
- Mercury
Heart & metabolic
18 Biomarkers
- LDL Small
- Lipoprotein (a)
- Apolipoprotein B (ApoB)
- Omega-3 Total
- Insulin
Aging
34 Biomarkers
- Sex Hormone Binding Globulin (SHBG)
- DHEA-Sulfate
- Insulin-like Growth Factor (IGF-1)
- Homocysteine
- Vitamin D
Mental health & focus
20 Biomarkers
- Cortisol
- High-Sensitivity C-Reactive Protein (hs-CRP)
- Iron
- Ferritin
- Methylmalonic Acid (MMA) (B12 Proxy)
The new standard for health
Health for a new, discerning generation
“I’ve been so impressed by Function.”
Andrew Huberman
"Function helps me understand my own biology."
Baya Voce
"I deeply believe in Function's mission."
Jay Shetty
"Helped me finally identify imbalances and optimize my hormones."
Mari Llewellyn
Function like Aimee
The cancer signals doctors missed
Function like Alan
From diabetes diagnosis to action
Function like Geoff
Finding prostate cancer after testing
Function like Catherine
You can't diet or exercise this away
Gold standard for lab testing
Labs trusted by the medical community. Established partners. Consistent, reliable results.
2,000+ lab test locations across the US
2,000+
2,000+
Over 75 million results delivered to Function members
75M+
75M+
Not your average checkup
Standard checkup
160+
Lab tests annually
~26
Personalized action plan
Upload past results
No insurance needed
Every 6 months
Hormones & fertility testing
Heavy metal & toxin testing
Metabolic & pancreatic testing
Heart testing beyond cholesterol
Nutrient/electrolyte testing
Autoimmunity testing
Thyroid testing
Access to MRI & CT
Access to Galleri® Multi-Cancer Test
Access to Alzheimers & brain testing
Access to mold reactivity testing
Standard checkup
Lab tests annually
160+
~26
Personalized action plan
Upload past results
No insurance needed
Every 6 months
Hormones & fertility testing
Heavy metal & toxin testing
Metabolic & pancreatic testing
Heart testing beyond cholesterol
Nutrient/electrolyte testing
Autoimmunity testing
Thyroid testing
Access to MRI & CT
Access to Galleri® Multi-Cancer Test
Access to Alzheimers & brain testing
Access to mold reactivity testing
Built with the world's top doctors
Function’s Medical & Scientific Board
Mark Hyman, M.D.
Former Cleveland Clinic physician. CMO of Function Health.
JoAnn E. Manson, M.D., MPH, DrPH
Chief of Preventive Medicine at Brigham & Women's Hospital. Professor at Harvard.
Andrew Huberman, PhD
Professor of Neurobiology at Stanford School of Medicine.
Toby Cosgrove, M.D.
Former CEO of Cleveland Clinic. Top heart surgeon.
Daniel Sodickson, M.D., PhD
Chief of Innovation at NYU Langone. Pioneer of AI-driven MRI.
Azra Raza, M.D.
Top medical oncologist. Professor at Columbia University.
Eddie Chang, M.D.
Professor & Chair of Neurological Surgery at UCSF.
Luis A. Diaz, M.D.
Head of the Division of Solid Tumor Oncology at Memorial Sloan Kettering Cancer Center.
Mark Hyman, M.D.
Former Cleveland Clinic physician. CMO of Function Health.
JoAnn E. Manson, M.D., MPH, DrPH
Chief of Preventive Medicine at Brigham & Women's Hospital. Professor at Harvard.
Andrew Huberman, PhD
Professor of Neurobiology at Stanford School of Medicine.
Toby Cosgrove, M.D.
Former CEO of Cleveland Clinic. Top heart surgeon.
Daniel Sodickson, M.D., PhD
Chief of Innovation at NYU Langone. Pioneer of AI-driven MRI.
Azra Raza, M.D.
Top medical oncologist. Professor at Columbia University.
Eddie Chang, M.D.
Professor & Chair of Neurological Surgery at UCSF.
Luis A. Diaz, M.D.
Head of the Division of Solid Tumor Oncology at Memorial Sloan Kettering Cancer Center.
What could cost you $15,000 is $365
Your health shouldn’t depend on insurance.
- 160+ lab tests annually
- Testing 2x/year and on-demand
- Insights from top doctors and researchers
- All-in-one for your whole body
- Tracked in one secure place
- Clinicians review every result and flag issues
- Personalized protocol for instant action
- Add MRI and CT scans anytime
- No insurance, transparent pricing
Frequently asked questions
What is Function?
Function is a membership that gives you access to 160+ lab tests, doctor-reviewed insights, and a personalized health plan so you can understand your results and take action over time.
Why was Function created?
We created Function with a single mission: empower you to live 100 healthy years. That starts by giving you a more complete view of your body through 160+ lab tests, advanced imaging, and insights from top doctors. From heart, hormones, and immunity to early signs of cancers, aneurysms, cysts, fatty liver, and more, Function can help you detect changes before symptoms appear—so you can take action earlier, and feel your best longer. It's time you own your health.
Will my results include explanations?
Yes. Every result comes with explanations created by top doctors and built on thousands of hours of research—so you’ll actually understand what your numbers mean. You’ll get action items and a clinician’s full summary.
Do biomarkers change over time?
Yes. Biomarkers shift with your lifestyle, stress, diet, and sleep. Regular testing shows what’s changing—and gives you the power to act on it.
How often do I test with Function?
At least twice a year. Membership includes 160+ lab tests annually, selected by the world’s top doctors to monitor for signs of thousands of diseases. Start with 100+ tests at your annual visit, and follow up with 60+ tests 3-6 months later to see what’s changed. Hormones, heart, thyroid, nutrients, metals, metabolic health, autoimmunity, liver, and electrolytes—what others skip, we don’t.
You can test any biomarker on-demand anytime for an additional member-only cost.