Function Health vs Superpower vs InsideTracker: Which Health Testing Service Is Best?
Health
Key Findings
Function Health is our pick for broad, bundled health testing: its $365 annual membership includes 100+ initial tests and 60+ follow-up tests. Superpower costs $349 annually for a 100+ biomarker baseline, a 50+ biomarker retest, AI guidance and care-team support. InsideTracker suits fitness-focused users, with up to 54 biomarkers and personalized recommendations; membership plus one Ultimate test costs $489. The best health testing service depends on the tests you need, follow-up support and total cost. Advertised annual test totals include repeat measurements, and none replaces primary care.
Blood results are easier to access than ever. Understanding what deserves your attention, and what to do next, can still be difficult.
Function Health, Superpower and InsideTracker package laboratory testing with dashboards and personalized guidance. Their appeal is convenience: arranging tests, explaining results and tracking changes through one service.
However, they offer different experiences. Someone seeking a broad baseline may choose differently from an athlete working on recovery or a person who wants help discussing unexpected results. Comparing biomarker tracking means looking beyond the headline number of tests.
What Can Comprehensive Health Testing Tell You?
Depending on the panel, testing can provide information about cardiovascular and metabolic health, thyroid and sex hormones, selected nutrients, inflammation, and liver and kidney function. Some platforms also calculate biological-age estimates or health scores from these measurements.
These are different types of information. A measured cholesterol result, a calculated ratio and a proprietary health score should not be treated as interchangeable. Likewise, a biological-age estimate does not tell you how long you will live. Longevity tracking tools are most useful when they help organize meaningful trends and practical next steps.
Function Health vs Superpower vs InsideTracker: Comparison at a Glance
The following compares advertised US offers from Function Health, Superpower and InsideTracker, checked on September 26, 2026.
Comparison | Function Health | Superpower | InsideTracker |
Best For | Broad bundled testing | Testing with ongoing support | Fitness and healthspan insights |
Starting Price | $365/year | $349/year | $489: membership + Ultimate test |
Included Testing | 100+ initial tests; 60+ follow-up | 100+ baseline; 50+ retest | Up to 54 biomarkers per Ultimate test |
Retesting | Mid-year panel included | Follow-up panel included | Extra, or buy a multi-test bundle |
Guidance | Clinician-reviewed insights, protocols and AI chat | Personalized protocol, AI and care team | Optimization zones and Action Plan |
Wearable Connections | Apple Health and other supported devices | Oura, WHOOP, Apple Health and others | Apple Health, Garmin, Oura and others |
Main Trade-Off | Broad testing does not equal ongoing medical care | Additional diagnostics and treatments cost extra | Higher cost for repeated full panels |
Function and Superpower's annual totals include follow-up measurements, rather than 160+ or 150+ different biomarkers at each appointment. Function also includes urine testing.
InsideTracker's $489 package includes its $149 annual platform membership and one $340 Ultimate test. Buying another individually brings the total to $829; its advertised membership-plus-two-tests bundle is $761. Smaller category panels start at $99. Additional testing, imaging and home collection can increase costs. Function and Superpower flag different pricing arrangements for New York and New Jersey.
Function Health, Superpower and InsideTracker: In-Depth Reviews
Each service combines testing with interpretation, but the experience differs in how results are explained, what support is available and how much follow-up costs.
Function Health Review
The Function Health testing service is designed around broad initial testing followed by a scheduled reassessment. Its included categories extend across heart health, hormones, thyroid function, nutrients, metabolic markers and other areas, with the current test directory separating included tests from paid additions.
The Function Health dashboard brings results and explanations together so you can review changes over time. Its app also offers personalized protocols, Private AI Chat and supported wearable connections. That matters when comparing Function Health vs Superpower: AI assistance is available from both, so the decision should not rest on that feature alone.
Function Health Key Features
Broad annual testing: An initial panel and a smaller follow-up panel provide a baseline and a chance to reassess selected markers.
Clinician-reviewed results: Review incorporates your health history and highlights findings that need attention.
Personalized guidance: Food, supplement and lifestyle information helps turn the report into possible next steps.
Longitudinal records: Results can be tracked over time, downloaded and shared with your own clinician.
Optional additional testing: Extended panels and imaging are available at additional cost.
Who Is Function Health For?
It suits people who want a broad testing package, expect to use the included follow-up and already have a clinician to consult when necessary. Reviewing a year of results can also be easier than collecting disconnected reports from several providers.
Function Health Drawbacks
Clinician review should not be confused with an ongoing doctor-patient relationship. Function explicitly states that it does not provide medical advice or replace medical care.
Appointments also require some planning. Its FAQ explains that some members, including those with an active menstrual cycle and members in Arizona, need two visits for the initial annual testing. The mid-year panel must be used before renewal. Extensive results can also create health-data overload if every flagged number becomes a separate project.
Verdict
Our strongest choice for broad bundled testing, particularly when you want an included follow-up and support from your existing clinician.
Superpower Review
The Superpower health testing service combines laboratory access with a personalized protocol, AI assistance and a care team. Its dashboard includes 17 health scores and a biological-age estimate, while supported wearable connections add context between blood tests.
Its main attraction is what happens after results arrive. Rather than leaving every follow-up question until the next appointment elsewhere, members can ask for help understanding their plan and coordinating next steps. The membership FAQ distinguishes concierge assistance with scheduling and coordination from access to clinical care.
Superpower Key Features
Baseline and retest: The annual package combines a broad initial panel with a smaller follow-up panel.
Health summaries: Scores organize results into areas that may deserve attention.
Personalized protocol: Recommendations cover lifestyle, nutrition and other potential interventions.
Superpower AI: Conversational guidance uses the information in your health profile.
Care-team access: Members can seek support and access additional diagnostics or services when appropriate.
The current Superpower membership costs $349 annually. At-home collection and additional services are separate expenses.
Who Is Superpower For?
Superpower is appealing if your biggest concern is understanding and acting on results. When comparing Function Health vs Superpower, ask whether you primarily want testing breadth or more opportunities to discuss the next step.
Superpower Drawbacks
Being able to message anytime does not mean an immediate clinician consultation. Superpower describes responses within one business day for concierge support. Confirm what is included before assuming ongoing consultations, prescriptions or treatment costs are covered.
Its marketplace also adds purchasing decisions. A suggested supplement or extra test deserves a clear explanation of its purpose and cost. Keeping a record of supplement use makes those conversations easier. Service availability varies by state.
Verdict
Our pick for testing with interactive support, provided the included care access matches what you need.
InsideTracker Review
InsideTracker focuses on interpreting biomarkers alongside lifestyle and wearable information. Its Ultimate panel covers up to 54 biomarkers, while the platform organizes recommendations around ten healthspan categories, including endurance, recovery, metabolism and sleep.
The emphasis is building habits from the results. Its membership features include personalized recommendations and an Action Plan. For someone already using nutrition-tracking apps or a fitness watch, that approach may feel familiar and useful.
InsideTracker Key Features
Ultimate blood panel: A focused set of biomarkers informs the platform's health analysis.
Personalized optimization zones: Results are assessed against InsideTracker's targets as well as presented for review.
Action Plan: Users select recommendations covering food, exercise, supplements and daily habits.
Wearable context: Supported connections include Apple Health, Garmin and Oura; the platform also offers its Terra AI guide.
Flexible follow-up purchases: Buy another Ultimate test or a narrower category panel. DNA testing and InnerAge are optional extras.
Who Is InsideTracker For?
It is most compelling for people interested in fitness, recovery and lifestyle experimentation who value guidance more than the largest panel. An optimization target is still a platform recommendation, not automatically a medical treatment threshold.
InsideTracker Drawbacks
The main limitation is cost. In a Function Health vs InsideTracker comparison, Function includes follow-up testing for less than InsideTracker charges for membership and one Ultimate test. InsideTracker's bundles improve the calculation but do not eliminate the difference.
It also measures fewer biomarkers, and its recommendation tools should not be mistaken for dedicated clinical management. If all you need is a particular repeat test, a full Ultimate purchase may be unnecessary.
Verdict
Best suited to fitness-focused interpretation and habit building. Its value depends on using the platform, rather than simply buying access to bloodwork.
Which Health Testing Service Is Best for Your Goals?
Your priorities should determine the winner. Here is how the three services compare on testing breadth, tracking changes, personalized support and value.
Which Tests the Most Biomarkers?
Function advertises the largest annual testing total of these three. However, counting repeated tests, calculated values and urine measurements alongside distinct blood biomarkers can obscure what you receive.
Compare the actual initial and follow-up panels against your goals. A test that helps answer a relevant question is more valuable than several results you have no clear reason to monitor.
Which Is Best for Tracking Changes?
Function and Superpower make repeat testing easier to budget for because a follow-up panel is included. Neither repeats every initial measurement automatically.
Check whether the marker you particularly want to reassess appears in that panel. InsideTracker offers more purchase flexibility, but you pay for it separately or through a bundle. Clear health dashboards can help organize trends, but consistent testing conditions also matter.
Which Provides the Best Personalized Advice?
Superpower is our preference for people who prioritize access to a team alongside digital recommendations. Function emphasizes clinician-reviewed findings and protocols; InsideTracker emphasizes optimization and habit selection.
All three now offer AI tools. The useful distinction is whether you need a clearer explanation, help coordinating follow-up or a clinician who can evaluate a medical concern.
Which Is Best for Athletes?
InsideTracker is the most natural fit for someone who wants to connect blood results with training and recovery habits. Its performance-oriented categories make the proposition easy to understand.
That does not establish superior sporting outcomes. The benefit depends on whether its advice leads to useful changes. Our guide to turning wearable metrics into health insights explores that broader challenge.
Which Offers the Best Value?
For broad testing and a planned follow-up, Function is our overall choice. Superpower costs $16 less per year and may be better value if its support is your priority. InsideTracker requires a higher budget for repeat full panels, even with the two-test bundle.
Before paying, compare the total including collection fees, any specific add-ons and the follow-up tests you actually want. Buying a larger package is not automatically economical if most of it is irrelevant to you.
Can These Services Replace Your Doctor?
No. They can help organize information and support better conversations, but symptoms, family history, medications and examination findings still matter.
MedlinePlus explains that healthy people can have results outside a reference range, while results inside it do not guarantee good health. Unexpected findings need interpretation, sometimes with further testing. Share your medication and supplement list, using a medication tracker if helpful, and do not change prescribed treatment based on a dashboard alone.
Alternatives to Function Health, Superpower and InsideTracker
If these memberships do not match your needs, other options offer home collection, more clinician involvement, individual tests or help making use of results you already have.
Neura Health
Neura Health is relevant when you already have results and want to consider them alongside your wider health information. It supports lab uploads and connections with health apps and wearables, helping bring periodic measurements together with everyday habits.
It does not supply a replacement blood test. Its role is helping you organize context and build personalized health plans. For example, you might review activity, sleep and food records alongside a clinician's advice, then use Neura's AI health coach to support a manageable routine between appointments.
SiPhox Health
SiPhox Health is worth considering if home sample collection is the priority. It offers at-home blood collection, selected biomarker panels and personalized guidance. Compare the exact panel and collection method with your needs before choosing it solely for convenience.
Lifeforce
Lifeforce places more emphasis on clinician consultations and ongoing care, including hormone-related concerns. Its offering includes a telehealth review and continued reassessment. It may suit someone seeking a clinical relationship, although treatments and overall costs need separate consideration.
Quest Health or Labcorp OnDemand
Quest Health and Labcorp OnDemand offer individually purchased tests and panels. They are useful InsideTracker alternatives when you have a specific testing need and do not want an annual optimization platform. Compare them with testing available through your own clinician, too.
Final Thoughts: Function Health vs Superpower vs InsideTracker
Function Health stands out for broad bundled testing, Superpower for support and InsideTracker for fitness-oriented guidance. Your choice comes down to which of those benefits you will actually use.
Choose Function Health If...
You want broad bundled testing and expect to use the included follow-up panel. It is our overall pick for that specific combination of coverage and cost.
Choose Superpower If...
You want comprehensive testing with AI guidance and access to a care team. Its support model may matter more to you than Function's slightly larger advertised annual test total.
Choose InsideTracker If...
You prioritize fitness-oriented interpretation, wearable context and structured habit changes, and are comfortable paying more for repeat full-panel testing.
Which Health Testing Service Is Best Overall?
Function is our preferred starting point for broad testing; Superpower is the strongest alternative for support, and InsideTracker has a clear fitness-focused use case. The best choice is the one that answers relevant questions and gives you a practical way to follow through.
At Neura, we see testing as one part of that process. Bringing results together with everyday activity, sleep and nutrition can help you keep useful context between appointments and turn agreed priorities into sustainable habits.
Article FAQ
Is Function Health worth it?
Function Health can be worth $365 annually if you want its broad initial panel and will use the included follow-up. It is less compelling if you only need one or two targeted tests or already receive appropriate monitoring through your clinician. Compare the included markers and potential extra costs before joining.
How does Function Health work?
You join, provide your health history and schedule testing through Function. Clinicians review the results, which appear with explanations and guidance in your dashboard. A smaller follow-up panel is included later in the membership year. Some people need more than one appointment to complete the initial testing.
What is InsideTracker?
InsideTracker is a health-analysis platform that combines blood biomarkers, personal information and optional DNA or wearable data to generate recommendations. Its Action Plan focuses on nutrition, exercise and lifestyle habits. The advertised $489 starter package includes an annual membership and one Ultimate blood test.
Who owns InsideTracker?
InsideTracker is operated by Segterra, Inc. Its official website identifies InsideTracker as a personalized nutrition model by Segterra. The company information also names Segterra as the legal entity; InsideTracker is the consumer-facing brand.
How much does Function Health cost compared with Superpower and InsideTracker?
Function advertises $365 per year and Superpower $349 per year, both with follow-up testing included. InsideTracker starts at $489 for membership and one Ultimate test; its two-test membership bundle is $761. These are September 2026 US advertised prices, before applicable collection fees, geographic adjustments or optional extras.
Are Function Health and Superpower tests covered by insurance?
Their standard memberships are self-pay rather than conventional insurance-billed testing. Both advertise HSA/FSA eligibility, subject to your account's rules. Eligibility does not guarantee reimbursement, so check before purchasing. Your clinician may be able to order medically appropriate tests through your usual insurance arrangements.
