Function like Aimee
The cancer signals doctors missed
Unlock your exclusive Equinox Member rate. 160+ advanced lab tests. Track the proof behind your training, from heart and hormones to immunity and more.
You say you’re at the apex of performance.
Prove it.
*Regularly $365/year. Offer powered by Equinox. Offer valid for Equinox Members who are new to Function. Credit applies to the first year of membership. Offer expired May 31, 2026.
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
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
Built with the world's top doctors
Function’s Medical & Scientific Board
Mark Hyman, M.D.
Former Cleveland Clinic physician. Co-founder and chief medical officer of Function.
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
Former chief of innovation in radiology at NYU Langone. Pioneer of AI-driven MRI. Chief medical scientist at Function.
Azra Raza, M.D.
Top medical oncologist. Professor at Columbia University.
Eddie Chang, M.D.
Professor and 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.
Jordan Shlain, M.D.
Primary care physician. Founder and chairman of Private Medical.
Jen Ashton, M.D., M.S.
Double board-certified in OBGYN and Obesity Medicine; MS in Nutrition.
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 160+ lab tests?
Anything less could miss critical parts of your health. Typical physicals tend to focus on conventional standards—and what insurance will cover. This broader view can give you key insights to take action sooner.
Why do some members need 2 lab visits for the Annual Test?
Many members can complete their Annual Test in a single lab visit. But members with an active menstrual cycle will need 2 separate visits for accurate hormone results. Members in Arizona also require 2 visits because of state processing rules. We will walk you through any details that apply to you during scheduling.
Which tests are included with a Function membership?
Members get access to 160+ lab tests annually, covering heart, hormones, thyroid, liver, and kidneys, as well as potential heavy metal exposures, nutrient levels, inflammation, potential cancer signals, and more. See all that's included here.
I'm an Equinox Member, how do I get access to Function?
Equinox Members get exclusive pricing for Function. For $249/year (regularly $365/year) Equinox Members receive access to 160+ lab tests. Open up your EQX+ App and navigate to Equinox Circle within ‘More’ + scroll to the Function offer to redeem this offer.
I’m an Equinox Member outside the US. Will you offer Function there?
At this time, Function is only available in the continental US.