Test smarter. Act sooner. Live longer.

Function gives you access to lab tests that standard care often skips—and the tools to act on your results. Know more and do more, before symptoms appear. 

Test what others miss

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Overlooked biomarkers you get with Function:
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15%

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Taking action before symptoms appeared

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verified member

+ more areas tested for whole-body insights

See all tests

Turn your data into action

Function isn’t just how you test. It’s how you take action. Track daily trends from wearables and other health devices, store your full health history, get answers from Private AI Chat, and follow next steps built around your results and goals. 

Trusted by thousands

Millions of tests. Just the beginning.

We built Function to open up access to the kind of health knowledge most people never had. 

Our members are now driving a new standard—taking control of their health, before symptoms start. 

50 million +
Tests completed by Function members

Setting a higher standard

Testing 2x a year

Your health can change fast. We keep up.

While standard healthcare only tests once a year, Function membership includes an Annual Test and a Mid-Year test 3-6 months later—to help you catch changes, track progress, and make smarter decisions before symptoms start.

100+ lab tests

We test what others miss.

Function membership includes 100+ biomarkers in your Annual Test and 60+ in your Mid-Year Test. This set of tests was rigorously selected by clinicians to flag risks that your average physical doesn’t.

Clinical-grade labs

Test with confidence.

All lab visits take place with trained phlebotomists, for cleaner samples and more reliable results. Your health information is protected with HIPAA-aligned systems and SOC 2 Type II compliance. That’s the Function standard.

Built with the world's top scientists

Function was created with leading doctors and researchers, so every test and insight reflects their clinical expertise.

Medical intelligence turns complexity into clarity

Function’s Medical Intelligence Lab brings together clinicians, researchers, and AI for a science-backed way to own your health. By connecting your lab results, health history, and connected devices, we’re here to create clarity from complexity and help you focus on what matters most.

Advanced tests, member-exclusive pricing

Function members have access to optional, advanced tests typically only available through specialists—giving you deeper visibility into cancer risk, neurological health, inflammation, and more.
Grail Cancer Test
Detect signals from 50+ types of cancer as early as Stage 1.
MRI & CT scans
Use powerful imaging to spot early signs of hundreds of diseases across up to 14 organs.
Extended panels
Test additional markers across heart health, nutrients, heavy metals, and conditions like Alzheimer’s.
Mold testing
Check for inflammation that may be linked to exposure from water-damaged buildings or toxins.