Marek Health vs. Function Health: Provider Comparison
Written by
John Stewart — Founder, Performance Protocol
John is an operator with two decades of experience building and leading performance-driven teams. He is not a physician. Performance Protocol exists because he needed a system for training, recovery, hormones, and cognitive output that was built on data rather than marketing — and could not find one.
Every protocol on this site references peer-reviewed research, with full citations listed on each page so claims can be verified at the source.
LinkedIn profileMarek combines laboratory testing with an optional guided clinical-care pathway. Function provides a broad testing membership with clinician-reviewed results. The key question is whether you want someone to evaluate and manage treatment or want laboratory data to bring to an existing clinician. Do not compare a clinic's full care bill with a testing-only membership as if they were the same purchase.
Official published information checked October 18, 2026. This is a desk-researched comparison, not a firsthand clinical-care review. Availability, pricing and service scope can change.
Head-to-head comparison
| Category | Marek Health | Function Health |
|---|---|---|
| Model | Lab diagnostics and separate guided clinical-care offerings | Annual testing membership |
| Lab testing | Selectable testing and panels; confirm collection options for your order | 160+ lab tests across the membership; Quest collection |
| Clinical oversight | Review and care scope depend on the service purchased | Clinician-reviewed findings; not ongoing treatment management |
| Published price | $595 Comprehensive Total Health Panel, including a 45-minute review | $365/year membership |
| Other costs | Guided care, follow-up, repeat labs and medication may be separate | Optional tests and outside treatment may cost extra |
| TRT | Clinical evaluation and prescribing where appropriate | Testing, not TRT prescribing |
| Best fit | People seeking guided decisions and longitudinal clinical care | People seeking a broad baseline for an existing clinician |
The clinical distinction
A laboratory panel, a result-review appointment and ongoing clinical care are three different services. Marek offers more than one of them; buying a panel does not automatically enrol you in comprehensive treatment. Ask which clinician owns the plan, how follow-up is booked and what happens when a result needs attention.
Function includes clinician review and flags findings for follow-up. That is useful, but it should not be described as full treatment or prescribing. You still need an appropriate clinician for diagnosis, confirmation, medication decisions and monitoring of an established condition.
Cost comparison
Marek's public diagnostics page lists a Comprehensive Total Health Panel at $595 with 80+ biomarkers and a 45-minute review. This is one published package, not a quote for all Marek services or the total cost of ongoing care. Guided Optimization has a separate scope, and no single verified all-in treatment price should be inferred from the panel.
Function's advertised annual membership is $365. Add-ons and outside medical care can increase the total. To compare fairly, obtain an itemised twelve-month estimate: initial testing, consultation, repeat labs, clinician visits, medication, shipping and cancellation terms. A cheaper testing package can become less useful if no one is available to act on its findings.
Who should consider Marek?
Consider a guided clinic if you want clinical evaluation and follow-up and are comfortable paying for those services. Its value depends on the quality of decisions and continuity of care, not how many optimisation options appear on a website. Ask for the rationale, evidence and risk assessment for any proposed treatment.
Peptides and other experimental interventions should not be treated as a standard benefit or a reason to select a clinic. Legal availability, regulatory status and human evidence differ by compound. A broader service menu is not proof that more interventions are appropriate.
Who should consider Function?
Consider Function if broad baseline testing is your objective and you already have access to clinical follow-up. Confirm the current test menu, collection locations, repeat-test schedule and add-on costs. The headline number of biomarkers is not necessarily the number repeated at each draw.
If you need ongoing hormone management, diabetes care or evaluation of persistent symptoms, a routine testing membership alone is not enough. Use existing medical care to define the clinical question before deciding whether extra testing adds value.
The Performance Protocol approach
Separate measurement from treatment. First define what needs evaluation, then choose the service capable of making and following the decision. Bring existing results to the clinician before buying overlapping panels. Use a longitudinal record, but do not mistake a rising number of tests for a better plan.
For TRT, review diagnosis, fertility considerations and monitoring requirements before comparing providers. For longevity, prioritise physical function and established risk factors over a maximal testing or medication stack.
Independent reading and clinical context
TRT eligibility and diagnosis · TRT monitoring · TRT delivery methods · Longevity Protocol
Hone Health review · Function Health review · Marek Health review
Official sources
- Marek: diagnostics and published panel price
- Marek: guided care offerings
- Function: membership inclusions and price
Other provider comparisons
- Hone Health vs. Function Health: Which Is Right for You?
- Hone Health vs. Marek Health: TRT Provider Comparison
Build your performance protocol
Start with an evidence-based framework. Decide what needs measurement and who will manage the result before purchasing testing or treatment.
Explore the TRT frameworkFrequently asked questions
Can I choose a provider based only on the number of biomarkers?+
Are the published fees the full cost of treatment?+
Educational only. Not medical advice.