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)
Plus, bring your results wherever you go
Share with your doctor or connect directly to AI.
Know what to do next
Your results are the starting point. Get clear notes reviewed by a clinician, a plan for what to do next, and more support available in Function.
Action Plan
Get clear next steps built from your lab results and health history.
- Built around your results
- Every action connects back to your labs and Clinician Notes.
- Focused on high impact
- See where to start across nutrition, movement, and supplements.
- Updated with your results
- Your plan changes as new results and Clinician Notes come in.
Clinician Notes
Get a clear summary of your results, all reviewed by a clinician.
- Reviewed by a clinician
- Get context on what’s in or out of range—and what matters most.
- Organized by system
- Easily navigate insights across heart, hormones, thyroid, and more.
- Connected to your Action Plan
- Your Clinician Notes and lab results inform your Action Plan.
Private AI Chat
Ask your private assistant about your health, all informed by your own data.
- Built on your data
- Connects all your Function data, including labs, health history, wearables, and more.
- Available 24/7
- Ask in the app or web anytime. Constantly refreshes with your data.
- Designed with clinicians
- Developed alongside Function’s medical team to ensure accuracy.
Supplements
SuppCo is now part of Function. Shop supplements you can trust—tailored to you.
- Based on your results
- Get suggestions from your Action Plan, then shop trusted supplements.
- Vetted for quality
- Every brand is independently tested by accredited labs.
- Earn 30% back
- Earn Supp Credits on every dollar you spend on supplements. 1 Credit=$1 toward your next order.
Specialist matching
Get help finding the right specialist—and scheduling care.
- Relevant to your results
- See which kind of specialist may be relevant to you.
- Matched by location
- Easily find specialists in your area.
- Help with scheduling
- Get help scheduling to move forward faster.
1/5
The new standard for health
Health for a new, discerning generation
"I recommend Function for every woman, every year of her life."
Dr. Jen Ashton
“I’ve been so impressed by Function.”
Andrew Huberman
"I deeply believe in Function's mission."
Jay Shetty
"Function helps me understand my own biology."
Baya Voce
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 testing, on your schedule
Labs trusted by the medical community. Test at 2000+ Quest locations nationwide, or schedule an at-home blood draw with a licensed specialist.
100M+
100M+
Over 100 million results delivered to Function members
2,000+ lab test locations across the US
2,000+
2,000+
Or we’ll come to you—have a licensed specialist come to your home or office.
Function with loved ones
Function with loved ones
Health is something we share. With Family Plans, it’s easier than ever. After you join, add the people you love for less than they’d pay alone—full memberships for everyone, all on one bill.
Add a family member or friend for just $340/year Compare insights and track progress together Each person decides what they’re comfortable sharing 
Sharing with Mom:
-
Biological Age -
Lab results - Clinician Notes
Sharing with Dad:
- Biological Age
- Lab results
-
Clinician Notes
Sharing with Grandpa:
- Biological Age
-
Lab results -
Clinician Notes
Not your average checkup
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
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.
Co-Founder and Chief Medical Officer.
Daniel Sodickson, M.D., PhD
Chief Medical Scientist at Function. Former Chief of Innovation in Radiology at NYU Langone.
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.
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.
Yves Michel Duroseau, M.D.
Chair of the Department of Emergency Medicine at Lenox Hill Hospital.
Jen Ashton, M.D., M.S.
Double board-certified in OBGYN and Obesity Medicine; MS in Nutrition.
Jordan Shlain, M.D.
Primary care physician. Founder and Chairman of Private Medical.
Mark Hyman, M.D.
Co-Founder and Chief Medical Officer.
Daniel Sodickson, M.D., PhD
Chief Medical Scientist at Function. Former Chief of Innovation in Radiology at NYU Langone.
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.
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.
Yves Michel Duroseau, M.D.
Chair of the Department of Emergency Medicine at Lenox Hill Hospital.
Jen Ashton, M.D., M.S.
Double board-certified in OBGYN and Obesity Medicine; MS in Nutrition.
Jordan Shlain, M.D.
Primary care physician. Founder and Chairman of Private Medical.
What could cost you $15,000 is $365
Your health shouldn’t depend on insurance.
- 160+ lab tests across your whole body
- Tested 2x a year and on-demand
- Insights from top doctors and researchers
- Blood draws at 2,000+ labs or at your home or office
- SuppCo Buying Club for trusted supplements
- Clinicians review every result and flag issues
- Personalized steps to help you take action
- Members-only pricing on MRI & CT
- No insurance, transparent pricing
Function blows my mind. The experience, price, and clinician notes are all phenomenal.
This is the most comprehensive lab testing I have ever had. I am thrilled to know more about my health and how to improve it.
Best money I have spent on healthcare.
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.