HSA/FSA Eligible

Check your health.

Every year. Starting with 160+ lab tests detecting 1000+ conditions. Just $365 per year—$1 per day.

Start testing

160+ lab tests

Total each year

Whole body

Tested 2x per year

$1 per day

$365 per year

160+ lab tests

Total each year

Whole body

Tested 2x per year

$1 per day

$365 per year

Testing is easy

01

160+ lab tests

Schedule at 2k+ Quest Diagnostics locations

02

Results explained

By top doctors and 1000s of hours of research

03

Follow your protocol

Take action. Test again.

Monitor early indicators of 1000s of diseases

Establish your long-term baseline
Tracked for life
Monitor how your body changes
Brain cancerAneurysmsOvarian cancerKidney stonesFatty liverThyroid cancerRisk of strokeAbnormal cysts
Prostate cancerPancreatic cancerIron overloadLiver cancerHerniasAneurysmsBrain cancerOvarian cancer

160+ lab tests chosen by top doctors

“The most powerful approach I’ve seen in my career. Uncompromising depth with no shortcuts.”

Mark Hyman, M.D.
Mark Hyman, M.D.

Former Cleveland Clinic physician

Hormones & thyroid

16 Biomarkers
  • Thyroxine (T4) Free
  • Thyroglobulin Antibodies (TgAb)
  • Testosterone, Total
  • Anti-Mullerian Hormone
  • Estradiol

Cancer & other silent risks

34 Biomarkers
  • GRAIL Cancer Test
  • Prostate Specific Antigen (PSA), Total
  • Rheumatoid Factor (RF)
  • Mercury
  • Lead

Heart & metabolic

18 Biomarkers
  • LDL Small
  • Lipoprotein (a)
  • Apolipoprotein B (ApoB)
  • Omega-3 Total
  • Insulin
  • Omega-6 Total

Aging

26 Biomarkers
  • Sex Hormone Binding Globulin (SHBG)
  • DHEA-Sulfate
  • Insulin-like Growth Factor (IGF-1)
  • Homocysteine
  • Vitamin D
  • Platelet Count

Mental health & focus

36 Biomarkers
  • Cortisol
  • High-Sensitivity C-Reactive Protein (hs-CRP)
  • Iron
  • Ferritin
  • Methylmalonic Acid (MMA) (B12 Proxy)
  • MTHFR, DNA

The new standard for health

Health for a new, discerning generation

2025 LinkedIn Top Startups
Mari Llewellyn

“I’ve been so impressed by Function.”

MariLlewellyn

Jay Shetty

“I’ve been so impressed by Function.”

JayShetty

Oprah Daily Self-Care O-Wards 2025
Baya Voce

“I’ve been so impressed by Function.”

BayaVoce

Fast Company Most Innovative Companies 2024

Real people. Real results.

Aimee's story

Aimee's story

The cancer signals doctors missed

Alan's story

Alan's story

From diabetes diagnosis to action

Geoff's story

Geoff's story

Finding prostate cancer after testing

Catherine's story

Catherine's story

You can't diet or exercise this away

Gold standard
for lab testing

Get reliable results from the same labs trusted by half the physicians and hospitals in the U.S.

As an official Quest Diagnostics partner, there are 2,000+ labs across the U.S.

2k

Over 3,000,000 tests have been completed. That's a lot.

40M+

Not your average checkup

Standard checkup

Function
160+

Lab tests annually

~26

No waiting for insurance approval

Biological age testing

Track progress 2x per year

Heart testing beyond cholesterol

Autoimmunity testing

Hormones and fertility testing

Heavy metal and toxin testing

Metabolic and thyroid testing

Scans and add-ons at member pricing

Standard checkup

Lab tests annually

160+
~26

No waiting for insurance approval

Biological age testing

Track progress 2x per year

Heart testing beyond cholesterol

Autoimmunity testing

Hormones and fertility testing

Heavy metal and toxin testing

Metabolic and thyroid testing

Scans and add-ons at member pricing

What could cost you $15,000 is $365

Your health shouldn’t depend on insurance.

HSA/FSA Eligible

Function Membership

$1 /day

Charged annually at $365

  • 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

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.

Function blows my mind. The experience, price, and clinician notes are all phenomenal.

Medical and scientific advisory board

The experts guiding the evolution of proactive health.

Mark Hyman, M.D.

Mark Hyman, M.D.

Former Cleveland Clinic physician. CMO of Function Health.

JoAnn E. Manson, M.D., MPH, DrPH

JoAnn E. Manson, M.D., MPH, DrPH

Chief of Preventive Medicine at Brigham & Women's Hospital. Professor at Harvard.

Andrew Huberman, PhD

Andrew Huberman, PhD

Professor of Neurobiology at Stanford School of Medicine.

Toby Cosgrove, M.D.

Toby Cosgrove, M.D.

Former CEO of Cleveland Clinic. Top heart surgeon.

Daniel Sodickson, M.D., PhD

Daniel Sodickson, M.D., PhD

Chief of Innovation at NYU Langone. Pioneer of AI-driven MRI.

Mark Hyman, M.D.

Mark Hyman, M.D.

Former Cleveland Clinic physician. CMO of Function Health.

JoAnn E. Manson, M.D., MPH, DrPH

JoAnn E. Manson, M.D., MPH, DrPH

Chief of Preventive Medicine at Brigham & Women's Hospital. Professor at Harvard.

Andrew Huberman, PhD

Andrew Huberman, PhD

Professor of Neurobiology at Stanford School of Medicine.

Toby Cosgrove, M.D.

Toby Cosgrove, M.D.

Former CEO of Cleveland Clinic. Top heart surgeon.

Daniel Sodickson, M.D., PhD

Daniel Sodickson, M.D., PhD

Chief of Innovation at NYU Langone. Pioneer of AI-driven MRI.

Frequently asked questions

See all frequently asked questions

Baseline testing that goes beyond the basics.

Stop asking for permission. Put yourself in control of your health.