Function empowers you to take ownership of your health through access to 100+ lab tests and advanced imaging, as well as powerful health insights that help you monitor for early signs of hundreds of diseases and create a health strategy that evolves with you.
"I am a strong advocate for the power of biomarker testing in optimizing health and longevity. It is a cornerstone of my practice. By providing a detailed, personalized snapshot of an individual’s biological functions, biomarker testing allows us to move beyond generalized advice and focus on what really matters for each person’s unique needs. We need to move to an era of "n of 1" medicine, and Function helps us empower that transition. I believe in the power of biomarker testing to empower people to take control of their health with science-backed, actionable data." -Dr. Darshan Shah
Use code DRSHAH100 as your access code and DRSHAH100 as your gift code at checkout to unlock your $100 credit.

100+ lab tests
Unique health insights
Clear next steps
DRSHAH100
Testing is easy
Explained by top doctors and researchers
No insurance needed
Transparent pricing
Heart testing beyond cholesterol
Autoimmunity testing
Hormones & fertility testing
Nutrient & electrolyte testing
Access to cancer testing
Standard checkup
As someone navigating an autoimmune condition, it's been such a relief to finally have a clear, visual way to track what’s going on in my body—and actually understand it.
Early detection has given me this amazing gift of extra years, probably extra decades, with my family.
After 10 years of dealing with a health issue, 5 years of trying to get doctors to run more in-depth tests, Function finally helped me uncover the root cause.
Real people. Real results.



