{{Infobox company | name = Function Health | logo = Function Health Logo.png | type = Private | founded = 2021 <ref name="AthleteTech">{{Cite web |last=Ostertag |first=Elizabeth |date=2025-02-05 |title=Product of the Week: Function Health |url=https://athletechnews.com/product-of-the-week-function-health/ |access-date=2025-06-22 |website=Athletech News |language=en-US}}</ref> | founder = {{Unbulleted list |Mark Hyman|Jonathan Swerdlin|Daniel Swerdlin|Pranitha Patil|Mike Nemke|Seth Weisfeld}} | hq_location_city = Austin, Texas | num_employees = 50 | website = {{URL|functionhealth.com}} }}{{Short description|American health technology company}} '''Function Health''', often stylized as simply '''Function''', is an American company and platform headquartered in Austin, Texas. The venture capital-backed company offers blood testing services. The company was co-founded by Mark Hyman, Pranitha Patil, Mike Nemke, Seth Weisfeld, Jonathan Swerdlin and Daniel Swerdlin.<ref name=":1">{{Cite web |last=Chowdhry |first=Amit |date=2024-07-06 |title=Function: Health Assessment Company Raises $53 Million |url=https://pulse2.com/function-health-assessment-company-raises-6-5-million/ |access-date=2025-06-19 |website=Pulse 2.0 |language=en}}</ref><ref>{{Cite web |last=Fedeli |first=Kristen |date=2024-01-02 |title=Function Health COO Pranitha Patil on Preventative Diagnostics |url=https://insider.fitt.co/function-health-co-founder-coo-pranitha-patil/ |access-date=2025-06-24 |website=Fitt Insider |language=en-US}}</ref>
The company offers a membership-based health platform with direct-to-consumer blood testing, urine testing (21 tests), for a total of 160 tests,<ref>{{Cite news |last=Brown |first=Kristen V. |date=2026-01-08 |title=The Rise of the Self-Serve Blood Test |url=https://www.nytimes.com/2026/01/08/well/function-health-blood-tests.html |access-date=2026-04-24 |work=The New York Times |language=en-US |issn=0362-4331}}</ref> along with AI-generated reports and cross-promotion of supplements,<ref name="mcgill">{{cite web |last=Jarry |first=Jonathan |title=Functional Medicine Is a Pipeline to Alt Med |url=https://www.mcgill.ca/oss/article/medical-critical-thinking-pseudoscience/functional-medicine-pipeline-alt-med |website=McGill University Office for Science and Society |date=June 12, 2025}}</ref> with an option of adding full-body MRI and CT scans. The company was valued at $2.5 billion in its last financing round in November 2025.<ref name=":7">{{Cite web |last=Park |first=Kate |date=2025-11-19 |title=Function Health raises $298M Series B at $2.5B valuation |url=https://techcrunch.com/2025/11/19/function-health-closes-298m-series-b-at-a-2-5b-valuation-launches-medical-intelligence/ |access-date=2025-12-12 |website=TechCrunch |language=en-US}}</ref>
== History == Function Health was founded in 2021 by Mark Hyman, Pranitha Patil, Mike Nemke, Seth Weisfeld, Jonathan Swerdlin and Daniel Swerdlin.<ref>{{Cite web |last=Liberatore |first=Josh |date=2024-12-24 |title=Is Aging a Choice? Doctors, Experts See Bright Future for Longevity Science |url=https://athletechnews.com/doctors-experts-longevity-science-disrupt/ |access-date=2025-06-19 |website=Athletech News |language=en-US}}</ref>
In 2023, Function Health completed more than three million lab tests.<ref name=":5">{{Cite web |last=Gupta |first=Shalene |date=March 19, 2024 |title=How Function Health is arming patients with extensive test results |url=https://www.fastcompany.com/91040051/function-health-most-innovative-companies-2024 |access-date=June 22, 2025 |website=Fast Company}}</ref> As of 2024, the company had at least 100,000 members and a waitlist of 200,000.<ref name=":6" /><ref name=":2" /><ref>{{Cite web |last=Maguire |first=Mia |date=2025-03-10 |title=Function Health: A Game-Changer for Accessible, Preventive Healthcare |url=https://www.thedailybeast.com/function-health-dr-mark-hyman-review/ |access-date=2025-06-23 |website=The Daily Beast |language=en}}</ref> That same year, Hyman stated there were over a million data points on Function Health’s first group of 10,000 people.<ref>{{Cite web |last=Elliot |first=Bryan |date=Dec 13, 2023 |title=Behind the Brand with Dr. Mark Hyman |url=https://www.inc.com/bryan-elliott/behind-brand-with-dr-mark-hyman.html |access-date=Jun 27, 2025 |website=Inc.}}</ref>
In May 2025, Function Health acquired Ezra (founded by Emi Gal) and planned to add Ezra's MRI scanning technology to its platform.<ref name=":4">{{Cite web |last=Capoot |first=Ashley |date=2025-05-05 |title=Function Health buys Ezra, launches full-body scan for a third of the price |url=https://www.cnbc.com/2025/05/05/function-health-mri-ezra.html |access-date=2025-06-22 |website=CNBC |language=en}}</ref><ref>{{Cite web |last=Turner |first=Brock E.W. |date=May 5, 2025 |title=Function Health acquires Ezra for MRI body scans |url=http://www.modernhealthcare.com/digital-health/function-health-ezra-mri-body-scans/ |access-date=2025-06-22 |website=Modern Healthcare |language=en}}</ref>
In 2025, Function Health was one of the offerings included in the Academy Awards nominees gift bag.<ref>{{Cite web |last=Jokic |first=Natasha |date=2025-03-01 |title=Here's What's Inside The $217k Gift Bag For Oscar Nominees This Year |url=https://www.buzzfeed.com/natashajokic1/oscars-2025-gift-bag |access-date=2025-06-24 |website=BuzzFeed |language=en}}</ref> That same year, the company launched a brand campaign for Mother's Day, called "Long Live Moms."<ref>{{Cite web |last=Navarro |first=Andrea |date=2025-04-28 |title=Function Health Launches First Brand Campaign, “Long Live Moms,” Ahead of Mother's Day |url=https://athletechnews.com/function-health-mothers-day-campaign/ |access-date=2025-06-27 |website=Athletech News |language=en-US}}</ref>
In June 2025, Function Health was named to Time's most influential companies of 2025 list.<ref>{{Cite web |last=Haupt |first=Angela |date=2025-06-26 |title=TIME100 Most Influential Companies 2025: Function Health |url=https://time.com/collections/time100-companies-2025/7289585/function-health/ |access-date=2025-06-27 |website=TIME |language=en}}</ref> In April 2026, the company acquired Getlabs, a mobile healthcare company that provides at-home diagnostic health testing.<ref>{{Cite web |last=DeSilva |first=Hayley |date=April 9, 2026 |title=Function Health acquires Getlabs, adds at-home lab services |url=http://www.modernhealthcare.com/mergers-acquisitions/mh-function-health-getlabs-acquisition/ |access-date=2026-04-30 |website=www.modernhealthcare.com |language=en}}</ref><ref>{{Cite web |last=Chowdhry |first=Amit |date=2026-04-09 |title=Function Health Acquires Getlabs To Expand At-Home Testing Access |url=https://pulse2.com/function-health-acquires-getlabs-to-expand-at-home-testing-access/ |access-date=2026-04-30 |website=Pulse 2.0 |language=en}}</ref>
== Technology == According to its website, Function Health is not a laboratory or medical provider. All consumers are sent to Quest Diagnostics locations for blood draws, and Quest Diagnostics is the laboratory that performs all tests.<ref name="how-it-works">{{cite web |title=How It Works |url=https://www.functionhealth.com/how-it-works |website=Function Health |access-date=December 24, 2025}}</ref> All laboratory and medical services are provided by independent third parties. Function Health also states that it does not offer medical advice, diagnosis, or medical treatment.<ref name="how-it-works" />
Function Health operates as a middleman between consumers and existing laboratory services. The company facilitates test ordering and presents results through its platform, but the actual specimen collection, laboratory analysis, and clinical interpretation are performed by other entities. Consumers pay Function Health, which then coordinates services through its network of third-party providers. This business model differs from vertically integrated laboratory services where a single company performs specimen collection, testing, and result delivery.
=== Artificial Intelligence === In November 2025, Function Health launched a generative large-language model (LLM) AI chatbot called "Medical Intelligence Lab."<ref name=":7" /> The chatbot was developed to provide personalized responses based on user data, wearables, lab results, doctor's notes and scans, and was developed under HIPAA standards.<ref>{{Cite web |last=Sette |first=Sam |date=2025-11-19 |title=Function Raises $298M, Hits $2.5B Valuation |url=https://insider.fitt.co/function-raises-298m-hits-2-5b-valuation/ |access-date=2026-05-28 |website=Fitt Insider |language=en-US}}</ref>
In January 2026, the company partnered with artificial intelligence company OpenAI on its launch of ChatGPT Health, a tab on OpenAI's chatbot focused on healthcare questions.<ref>{{Cite web |last=Haupt |first=Angela |date=Jan 9, 2026 |title=Is Giving ChatGPT Health Your Medical Records a Good Idea? |url=https://time.com/7344997/chatgpt-health-medical-records-privacy-open-ai/ |website=Time (magazine)}}</ref> ChatGPT Health connected to health platforms and apps, like Function Health, Apple Health (via iOS), MyFitnessPal, Weightwatchers, AllTrails, Peloton and Instacart.<ref>{{Cite web |last=O’Brien |first=Amy |date=2026-01-08 |title=What ChatGPT Health Means for the Wellness Industry |url=https://www.vogue.com/article/what-chatgpt-health-means-for-the-wellness-industry |access-date=2026-05-28 |website=Vogue |language=en-US}}</ref> That same month, Function Health created a connector for Anthropic's chatbot Claude that allowed users to receive results personalized based on the LLM's access to their health data and lab results via the Function Health app.<ref>{{Cite web |last=Kahn |first=Jeremy |title=Anthropic rolls out new healthcare and life science features for Claude |url=https://fortune.com/2026/01/11/anthropic-unveils-claude-for-healthcare-and-expands-life-science-features-partners-with-healthex-to-let-users-connect-medical-records/ |access-date=2026-05-28 |website=Fortune |language=en}}</ref><ref>{{Cite web |last=Kim |first=Eugene |title=Anthropic expands into healthcare a week after OpenAI launched a similar product |url=https://www.businessinsider.com/anthropic-chases-openai-ai-heath-claude-2026-1 |access-date=2026-05-28 |website=Business Insider |language=en-US}}</ref> In March 2026, the company announced integrations with chatbots Perplexity AI and Microsoft Copilot.<ref>{{Cite web |last=Herrera |first=Sebastian |date=2026-03-12 |title=Microsoft’s New AI Health Tool Can Read Your Medical Records and Give Advice |url=https://www.wsj.com/tech/ai/microsofts-new-ai-health-tool-can-read-your-medical-records-and-give-advice-d731f883 |access-date=2026-05-28 |website=The Wall Street Journal |language=en-US}}</ref><ref>{{Cite web |last=Kumari |first=Sweta |date=March 20, 2026 |title=Perplexity launches Health feature with Apple Health, Fitbit integration |url=https://www.business-standard.com/amp/technology/tech-news/perplexity-launches-health-feature-with-apple-health-fitbit-integration-126032000326_1.html |archive-url=http://web.archive.org/web/20260519022613/https://www.business-standard.com/amp/technology/tech-news/perplexity-launches-health-feature-with-apple-health-fitbit-integration-126032000326_1.html |archive-date=2026-05-19 |access-date=2026-05-28 |website=www.business-standard.com |language=en-US}}</ref>
== Fundraising == Since its founding, the company conducted three seed rounds. In March 2022, the company raised $3 million, with additional rounds in December 2023, and April 2024, although the amount raised during these rounds was unreported.<ref name=":0">{{Cite web |title=How Much Did Function Health Raise? Funding & Key Investors {{!}} Clay |url=https://www.clay.com/dossier/function-health-funding |access-date=2025-06-19 |website=www.clay.com |language=en}}</ref>
In June 2024, the company was valued at $191 million following its series A fundraising round of $53 million from Andreessen Horowitz, Wisdom.vc, Draft Ventures, K5 and G9 Ventures, among others.<ref>{{Cite web |last=Bradbury |first=Rosie |date=2025-02-19 |title=Redpoint-led round values longevity startup Function Health at $2.5B |url=https://pitchbook.com/news/articles/redpoint-lead-funding-round-longevity-startup-function-health-2-5b-valuation |access-date=2025-06-19 |website=PitchBook |language=en}}</ref><ref name=":0" />
Function Health has received investment from institutions like 53 Stations and Embiid Ventures, as well as individual businesspeople, investors and doctors, including Ari Emanuel, Casey Means, Harvey Spevak, former Oura CEO Harpreet Singh Rai, and Jeff Dean.<ref name=":1" /> The company also has received investment from actors and influencers like Matt Damon, Kevin Hart, Zac Efron, Pedro Pascal and Jay Shetty, and sports figures including Blake Griffin, Colin Kaepernick and Jimmy Rollins.<ref name=":2">{{Cite web |last=Aquino |first=Steven |title=Function's Dr. Mark Hyman Talks Transparency In Healthcare, New Funding Round, More In Interview |url=https://www.forbes.com/sites/stevenaquino/2024/06/27/functions-dr-mark-hyman-talks-transparency-in-healthcare-new-funding-round-more-in-interview/ |access-date=2025-06-19 |website=Forbes |language=en}}</ref><ref name=":3">{{Cite web |last=Haupt |first=Angela |date=2024-12-04 |title=What Getting 105 Blood Tests From a Health Startup Taught Me |url=https://time.com/7176591/function-health-startup-blood-tests-preventive-medicine/ |access-date=2025-06-19 |website=TIME |language=en}}</ref>
In November 2025, Function Health announced a $298 million Series B financing at a $2.5 billion valuation, led by Redpoint Ventures.<ref>{{Cite web |last=Park |first=Kate |date=2025-11-19 |title=Function Health raises $298M Series B at $2.5B valuation |url=https://techcrunch.com/2025/11/19/function-health-closes-298m-series-b-at-a-2-5b-valuation-launches-medical-intelligence/ |access-date=2025-12-12 |website=TechCrunch |language=en-US}}</ref>
== Partnerships == In May 2024, the company partnered with health club Equinox Group to offer a personalized nutrition, sleep and fitness coaching program, which included lab testing from Function Health.<ref name=":6">{{Cite web |last=Gil |first=Bruce |date=Dec 4, 2024 |title=Function Health Grail Cancer Test |url=https://qz.com/function-health-grail-cancer-test-1851712744 |access-date=2025-06-23 |website=Quartz |language=en}}</ref><ref>{{Cite news |last=Smith |first=Dana G. |date=2024-05-07 |title=Could Equinox's New $40,000 Membership Really Help You Live Longer? |url=https://www.nytimes.com/2024/05/07/well/live/equinox-40000-optimize-longevity-membership.html |access-date=2025-06-23 |work=The New York Times |language=en-US |issn=0362-4331}}</ref> The program was developed to help members measure physical and mental performance in relation to their fitness goals.<ref>{{Cite web |last=Greenfield |first=Beth |title=Equinox is offering a $40,000 a year personalized wellness program to help you live longer. Here's what it includes |url=https://fortune.com/well/article/equinox-fitness-longevity-program/ |access-date=2025-06-27 |website=Fortune Well |language=en}}</ref><ref>{{Cite web |last=Cerullo |first=Megan |date=2024-05-06 |title=Equinox's new fitness program aims to help you live longer — for $40,000 - CBS News |url=https://www.cbsnews.com/news/equinox-optimize-gym-membership-longevity/ |access-date=2025-06-27 |website=www.cbsnews.com |language=en-US}}</ref> In October 2024, the company partnered with Thrive Global, a health technology company founded by Arianna Huffington. The partnership offered a health coaching program to employees.<ref>{{Cite web |last=Paulise |first=Luciana |title=AI-Powered Wellness: Thrive Global And Function Health's New Synergy |url=https://www.forbes.com/sites/lucianapaulise/2024/10/30/ai-powered-wellness-thrive-global--function-healths-new-synergy/ |access-date=2025-06-24 |website=Forbes |language=en}}</ref>
In December 2024, the company announced its partnership with biotechnology company Grail to provide members with a multi-cancer early detection (MCED) test, or liquid biopsy, that screens for 50 different types of cancers, including the Galleri test, which is a blood-based MCED test developed by GRAIL. The test reviews DNA patterns of different types of cancers before they become symptomatic.<ref name=":6" />
In February 2025, the company announced a partnership with the National Basketball Players Association.<ref>{{Cite web |last=Knight |first=Jacob |date=Feb 5, 2025 |title=Function Health Partners with NBPA to Revolutionize Athlete Health |url=https://connectthewatts.com/2025/02/05/function-health-partners-with-nbpa-to-revolutionize-athlete-health/ |access-date=June 23, 2025 |website=Connect The Watts}}</ref> The partnership provided NBPA members with access to its lab tests, which Forbes reported is "significantly more" than players receive in their standard medical panels through their teams.<ref>{{Cite web |last=M.D |first=Brook Choulet |title=How The National Basketball Players Association Is Prioritizing Athlete Health |url=https://www.forbes.com/sites/brookchoulet/2025/02/05/how-the-national-basketball-players-association-is-prioritizing-athlete-health/ |access-date=2025-06-24 |website=Forbes |language=en}}</ref><ref>{{Cite web |last=Pennic |first=Fred |date=2025-02-05 |title=NBA Players Gain Access to Advanced Biomarker Testing Through NBPA/Function Health Partnership |url=https://hitconsultant.net/2025/02/05/nba-players-gain-access-to-advanced-biomarker-testing/ |access-date=2025-06-24 |language=en-US}}</ref> In April 2025, the company partnered with Thatch, an employer health benefit platform, to offer employees access to preventive diagnostic testing.<ref>{{Cite web |last=Rehfeldt |first=Courtney |date=2025-04-30 |title=Thatch Launches Curated Health Marketplace, Teams With Function Health |url=https://athletechnews.com/thatch-launches-curated-health-marketplace-teams-with-function-health/ |access-date=2025-06-24 |website=Athletech News |language=en-US}}</ref>
In January 2026, Function Health partnered with fast casual restaurant Sweetgreen to offer a limited-time menu developed under Hyman's guidance.<ref>{{Cite web |last=Leasca |first=Stacey |date=2026-01-07 |title=Salad Rx: Sweetgreen's Newest Menu Is Designed by a Doctor |url=https://www.goodhousekeeping.com/health/diet-nutrition/a69927471/sweetgreens-doctor-designed-menu/ |access-date=2026-04-30 |website=Good Housekeeping |language=en-US}}</ref><ref>{{Cite web |last=Jennings |first=Lisa |date=Jan 6, 2026 |title=Sweetgreen taps longevity expert for latest collab |url=https://restaurantbusinessonline.com/food/sweetgreen-taps-longevity-expert-latest-collab |access-date=2026-04-30 |website=Restaurant Business |language=en}}</ref> In February 2026, the company partnered with grocery chain Erewhon for a limited edition smoothie.<ref>{{Cite web |last=Lebsack |first=Lexy |date=2026-02-17 |title=Function Health’s new Erewhon smoothie was designed to highlight nutritional gaps and promote telehealth lab testing |url=https://www.glossy.co/beauty/wellness/function-healths-new-erewhon-smoothie-was-designed-to-highlight-nutritional-gaps-and-promote-telehealth-lab-testing/ |access-date=2026-04-30 |website=Glossy |language=en}}</ref>
== Blood draw volume requirement == According to Function Health's FAQ, the service requires "about 35-85 mL depending on the person," which usually comes out to five to 10 vials, collected across two separate visits to Quest Diagnostics locations.<ref name="function-faq">{{cite web |title=FAQ |url=https://www.functionhealth.com/faq |website=Function Health |access-date=December 24, 2025}}</ref>
== Criticism == Some doctors and academics have said that Function Health's tests are unnecessary and expensive, and may introduce patient anxiety.<ref name=":3" /><ref>{{Cite news |last=Brown |first=Kristen V. |date=2026-01-08 |title=The Rise of the Self-Serve Blood Test |url=https://www.nytimes.com/2026/01/08/well/function-health-blood-tests.html |access-date=2026-03-25 |work=The New York Times |language=en-US |issn=0362-4331}}</ref> Jonathan Jarry, a researcher at McGill University's Office for Science and Society, has also criticized some of the claims made by Function Health, such as 25% of the population having heavy metal poisining.<ref name="mcgill">{{cite web |last=Jarry |first=Jonathan |title=Functional Medicine Is a Pipeline to Alt Med |url=https://www.mcgill.ca/oss/article/medical-critical-thinking-pseudoscience/functional-medicine-pipeline-alt-med |website=McGill University Office for Science and Society |date=June 12, 2025}}</ref>
==References== {{Reflist|2}}
Category:Companies based in Austin, Texas Category:American companies established in 2021 Category:Privately held companies based in Texas Category:Medical technology companies of the United States