COMPARISON GUIDE

Function Health vs. Precision Health Reports: What You Need to Know Before You Choose

An apples-to-apples comparison of scope, clinical context, and where each option fits best.

When choosing a health assessment, patients and clinicians want clarity: which approach provides the most relevant, actionable insights? Here we break down the similarities and differences between Precision Health Reports’ Cardiometabolic Risk Assessment and Function Health’s whole-body testing subscription.

An Overview of Each Approach

Function Health

Function Health is a well-funded, well-marketed platform, $350 million raised, 200,000+ members, and a co-founder (Dr. Mark Hyman) with a massive public following. If you want 160+ biomarkers covering everything from cortisol to testosterone in a clean consumer app, they deliver it. But if the specific question on your mind is whether you are at elevated risk for a heart attack, type 2 diabetes, or metabolic syndrome, and what to do about it with clinical precision, the comparison looks very different.

Precision Health Reports

Precision Health Reports does one thing: cardiometabolic risk assessment, built on the same ACC, AHA, NLA, and EAS clinical guidelines your cardiologist uses, interpreted through a framework designed by one of the country's leading lipidologists. That is a different product for a different and more specific need.

📖 Take a deeper dive into overall cardiometabolic disease and the Cardiometabolic Risk Assessment.

Precision Health Reports vs. Function Health

Feature Precision Health Reports Function Health
Primary Focus Cardiometabolic disease risk (metabolic syndrome, diabetes, ASCVD events) Broad health overview with 100+ biomarkers across multiple systems
Clinical Rigor 2026 Guideline-aligned (ACC, NLA, AHA, ESC); advanced biomarkers like ApoB, Lp(a), GlycA or hsCRP, LP-IR or fasting insulin, A1c, and metabolic panel Standard reference ranges, less personalized clinical thresholds
Annual Price $249 per assessment or as little as $35/month $365/year (as of November 2025)
Who Interprets the Results Framework built by Dr. William Cromwell, MD, FAHA, FNLA, a board-certified lipidologist, Lancet-published AI algorithm ("Medical Intelligence" with no individual physician review)
User Experience Clinician-ready PDF reports for direct primary care (DPC), concierge, and employer clinics Consumer app with trend tracking and wellness insights
Supplement Sales None; conflict of interest with providing the best personal assessment Yes, integrated into the recommendations as part of the upsell with a financial incentive to recommend supplements as part of its protocol
Repeat Testing Full advanced biomarker panel with every assessment Year 2 includes only ~25% of Year 1 biomarkers
Best Fit Individuals with cardiometabolic concerns, clinicians providing the best guideline-based care for their patients, and employers offering a unique benefit Consumers wanting broad preventive wellness insights with a lot of lab values

Pricing shown is indicative and may vary by plan, location, or promotions.

Primary Differences between Function Health and Precision Health Reports

1. Breadth vs. Depth

  • Function Health: Measures a broad array of health factors across many body systems including heart, thyroid, cancer, autoimmune, liver, kidneys, and others. In Year 2, Function Health members receive approximately 25% of the biomarkers tested in Year 1.

  • PrecisionHealth Reports: Narrower focus, but deeper clinical precision within cardiometabolic disease focused on metabolic and cardiovascular disease risk. While Lp(a) is only tested with the initial Cardiometabolic Risk Assessment, all other biomarkers are tested with each Follow-up.

2. Consumer vs. Clinical Orientation

  • Function Health: Very nice app-delivered user interface, designed for direct-to-consumer use.

  • Precision Health Reports: Downloadable report delivered for individuals, direct primary care, concierge, and employer wellness clinics, with physician-friendly outputs.

3. Interpretation and Actionability

  • Function Health: Labs are interpreted against standard reference ranges, with limited adjustment for clinical guidelines.

  • Precision Health Reports: Risk models integrate ethnicity, family history, and guideline cut-points, delivering personalized treatment threshold goals.

4. Cost Comparison

  • Function Health: Annual subscription at $365/year (as of November 2025) with repeat testing included.

  • Precision Health Reports: DTC for $249/Assessment or 2/year annual subscription for as little as $35/mo.

Precision Health Reports was built on the clinical framework of Dr. William Cromwell, MD, FAHA, FNLA:

•       Board-Certified Lipidologist

•       Fellow, American Heart Association

•       Fellow, National Lipid Association

•       30+ years of specialty practice in lipid and metabolic disorders

•       23 peer-reviewed publications, including research published in The Lancet

•       Former Chief Medical Officer of LipoScience, the company that developed the NMR LipoProfile test from LabCorp used in every Precision Health Reports assessment

This is the expertise behind every Cardiometabolic Risk Assessment we deliver. It is not a wellness algorithm. It is not a functional medicine framework. It is the same evidence-based lipidology that informs the national clinical guidelines your cardiologist uses.

'When AI Reads Your Health Data—and When It Should Not

In November 2025, Function Health raised $298M and launched what they call 'Medical Intelligence' which is an AI model that interprets your lab results and generates recommendations. In January 2026, they launched a ChatGPT integration allowing members to share their lab summaries with OpenAI's model for personalized prompts.

This is a meaningful distinction for anyone making a health decision. Precision Health Reports' analysis is built on a framework designed by William Cromwell MD, a board-certified lipidologist with 35 years of specialty practice working with real patients. In addition to his vast clinical practice experience, he is well-published in peer-reviewed publications and was a co-creator of the NMR-Lipoprofile test now offered through LabCorp. The interpretation logic follows ACC, AHA, and NLA clinical guidelines established by evidence-based cardiology research, not by an AI model trained on general data.

This is not a technology argument. We use a lot of technology to speed our Assessment delivery as well. It is a question of what kind of expertise you want behind the answer to one of the most important health questions you will ask.

Already a Function Health member?

If you have recent lab results on file, you may not need a new draw at all. PHR's Bring Your Own Labs assessment lets you upload your existing results for a full cardiometabolic risk interpretation—guideline-based risk scoring, personalized targets, and a clinician-ready report. All for just $99. No new bloodwork required.

Get Started then Upload Your Existing Labs

Get Your Own Specialist-Grade Personalized Assessment

Your cardiometabolic risk is not a wellness question—it is a clinical one. Get a complete Cardiometabolic Risk Assessment built on guideline-based lipidology, with personalized risk-reduction targets your physician can act on. Assessments start at $99 for existing lab results and $249 with a new draw at Quest Diagnostics or LabCorp. No subscription required.
Order Your Own Assessment Today

Frequently Asked Questions

  • Precision Health Reports focuses specifically on cardiometabolic disease risk—conditions like metabolic syndrome, type 2 diabetes, and cardiovascular events. It applies clinical guidelines and advanced biomarkers to give a personalized, clinician-ready plan. Function Health offers a broader panel of over 100 biomarkers across many of your body’s systems, presented in a convenient consumer app.

  • Precision Health Reports is designed with physicians and wellness programs in mind. Reports integrate with guideline thresholds and provide actionable treatment targets. Function Health is consumer-first, designed for self-tracking and broad wellness insights rather than clinical decision-making.

  • Function Health may appeal more to consumers who want to see a wide range of lab markers, including hormones, vitamins, and immunity, within a lifestyle-oriented app. Precision Health Reports is more specialized for people and doctors wanting to optimize cardiometabolic disease risk.

  • Precision Health Reports assessments start at $99 for those with existing lab results (BYO Labs) and $249 for a full assessment with a new draw at Quest Diagnostics. Subscription plans are available from $35/month (2 assessments/year) or $50/month (3 assessments/year). Clinic and employer pricing varies.

  • Yes, but the interpretation differs. Precision Health Reports integrates markers like ApoB, Lp(a), GlycA, and LP-IR into guideline-based risk models, giving personalized risk-reduction thresholds. Function Health includes these labs as part of its broad panel, but results are compared to standard reference ranges without personalized risk adjustment.

  • With Function Health, annual or quarterly testing is included in the subscription. With Precision Health Reports, frequency depends on an individual’s situation. Those at higher risk and applying interventions to reach their personalized goals may complete Assessments two to three times per year to track progress and update treatment goals.