Functionhealth

Function Health was co-founded by Dr. Mark Hyman, a prominent functional medicine physician and bestselling author, alongside Jonathan Swerdlin. Dr. Hyman's philosophy of using deep biomarker data to prevent disease — rather than treat it after symptoms appear — is the intellectual foundation behind everything Function offers.

Dr. Mark Hyman is a co-founder of Function Health and is deeply embedded in its content and medical philosophy. His functional medicine approach, which treats comprehensive lab data as the starting point for lasting health, shapes how Function designs its testing panels and educates its members.

A Function Health membership covers over 160 lab tests in total, structured as an initial panel of more than 100 advanced biomarkers followed by a 60-plus-test follow-up to track changes over time. Members also gain access to a 22-minute advanced imaging MRI powered by FDA-cleared AI, with all results stored and interpreted in one secure platform alongside guidance from top doctors.

Function Health offers a 22-minute full-body MRI that uses FDA-cleared artificial intelligence to analyze imaging for early signs of disease across thousands of conditions. Unlike a physician-ordered MRI targeted at a specific symptom, Function's scan is proactive — designed to surface abnormalities before any symptoms appear as part of a broader preventive health membership.

Yes, Function Health's comprehensive lab panels include biomarkers linked to early cancer detection, and their AI-powered MRI is designed to detect early signals of thousands of conditions including certain cancers. The brand's content regularly emphasizes catching these signals before they become symptomatic, which is central to their 100 healthy years mission.

Function Health featured Rumer Willis in content specifically focused on brain health, a cause with deep personal resonance given her father Bruce Willis's diagnosis with frontotemporal dementia. Her story illustrates Function's push for proactive neurological monitoring and connects with audiences who are thinking seriously about hereditary or age-related brain conditions.

Function Health posted on their original @functionhealth account that they had migrated to the shorter handle @function, describing it as the same mission under a new name. The rebrand reflects the company's evolution from a niche lab-testing startup into a broader preventive health platform seeking mainstream recognition.

A standard physician-ordered panel typically checks a limited number of markers — often fewer than 20 — and is usually triggered by existing symptoms rather than prevention. Function Health runs over 160 biomarkers from a single draw, adds a structured follow-up panel, and layers in an AI-powered MRI, giving members a far more complete picture of their health before problems emerge.

Function Health specifically states that the artificial intelligence used to analyze their advanced imaging MRI results is FDA-cleared, meaning the AI software has gone through regulatory review. This is distinct from a standard clinical MRI ordered by a doctor; Function's offering packages that FDA-cleared analysis as part of a consumer-facing preventive health membership.

Function Health is based in the United States, and the large majority of its membership and audience is American, though its YouTube content reaches viewers across the UK, Australia, Canada, and Mexico as well. As of mid-2026 the service is primarily US-focused, though their content is consumed internationally by people interested in advanced preventive health testing.