Function Health, often stylized as Function, is an American health technology company and platform headquartered in Austin, Texas, founded in 2021 by Mark Hyman, Pranitha Patil, Mike Nemke, Seth Weisfeld, Jonathan Swerdlin, and Daniel Swerdlin. Function offers a membership-based health platform, providing direct-to-consumer blood and urine testing (over 100 tests). The company uses AI to generate reports and cross-promotes supplements, with options to add full-body MRI and CT scans. Function is not a laboratory or medical provider but acts as an intermediary between consumers and existing laboratory services, like Quest Diagnostics, for blood draws and tests. It does not offer medical advice, diagnoses, or treatment.
Function's mission is to empower individuals to live 100 healthy years by providing a comprehensive understanding of their bodies. The platform gives access to 100+ lab tests for $499 per year, including assessments of heart health, hormones, thyroid function, nutrients, cancer signals, immunity, and more. Results are displayed on a user-friendly dashboard with summaries from clinicians. By June 2024, Function had nearly 50,000 paying members and a waitlist of over 200,000. In May 2025, Function Health acquired Ezra, with plans to incorporate Ezra's MRI scanning technology. In November 2025, the company was valued at $2.5 billion in its last financing round.
