Function Health vs InsideTracker

What is Function Health, and what is InsideTracker?

Function Health and InsideTracker each turn a blood test into a plan, and they split on how that plan is made and what the test includes.

Function Health is built around a yearly cycle of two draws. Clinicians read your results next to your health history and write the analysis and action plan.

InsideTracker opens its homepage with "Track everything" and offers "a personalized plan based on all your body's data." Its plan comes from an AI engine and a science team rather than a clinician read.

Biological age shows the split plainly. Function includes it, and InsideTracker sells it separately.

What does Function Health include?

The $365 Function Health membership pays for two blood draws a year, 160+ lab tests in total, a clinician-reviewed plan, and a dashboard.

Function walks members through four steps:

1. Schedule tests — Add your health history first, then book a draw.
2. Get insights — Clinician review turns the numbers into priorities and next moves.
3. Take action — A retest every 3 to 6 months shows which changes held.
4. Monitor for life — Results accumulate so trends and early signs stand out.

The first draw runs about 115 biomarkers. Six months in, a second draw repeats about 60 of them, and it costs nothing extra. Members can also ask questions about their results in a private AI chat, or inside ChatGPT, Claude, or Perplexity.

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What does InsideTracker include?

An InsideTracker membership adds the Terra AI health guide, Nutrition DeepDive, a Healthspan Habit Report, and a member community on top of the blood test you buy.

InsideTracker sets out a five-step journey:

1. Join InsideTracker — Choose the Ultimate test and arrange a draw, in a lab or at your door.
2. Tell us about you — Fill in a health profile covering nutrition, supplements, exercise, and lifestyle.
3. Review analysis — See which scores and markers are optimal, then read your habit changes.
4. Take action — Use ProTips and check-ins to stay accountable, and sync a wearable.
5. Retest and refine — Test again after 3 to 6 months to see what moved.

Wearables sync from Apple Health, Oura, Fitbit, and Garmin. The membership also accepts DNA uploads from Ancestry and 23andMe, plus up to 30 blood result sets a year from other providers.

What biomarkers do Function Health and InsideTracker measure in 2026?

Function Health's first draw counts 116 to 118 biomarkers, 20 of them urinalysis, while InsideTracker's Ultimate panel list counts 46 per member, with no urinalysis.

InsideTracker's store headline says up to 54 biomarkers. Its help-center panel list counts 46 for each member, and neither source includes urinalysis.

Function's add-on catalog includes:

• Heart, thyroid, and autoimmunity — Heart and metabolic extensions, genetic heart risk, thyroid add-ons, and celiac.
• Hormones, toxins, and nutrients — Extended hormone health, heavy metals, PFAS, and extended vitamins.
• Cancer, brain, and allergies — The GRAIL cancer test, Alzheimer's detection, and ApoE risk.
• Scans — Heart CT, lung CT, and MRI through Ezra.

InsideTracker's add-ons include:

• Healthspan Category Tests — Ten member-only tests, such as Metabolism, Heart Health, and Hormone Balance, at $99 or $149 each.
• Hormones — An estradiol and progesterone add-on at $89.
• DNA — An at-home cheek-swab DNA Kit for $249, sold in the US only.

What are the official 2026 membership prices for Function Health and InsideTracker?

Function Health costs $365 a year with both draws included. InsideTracker's new-customer bundle is $489, which pairs the membership with one Ultimate blood test.

A second test is priced separately at InsideTracker. A bundle with two Ultimate tests costs $761, and members pay $340 for one extra test. The membership renews at $149 a year.

On a year with one test, InsideTracker costs $489 to Function's $365, and Function's price includes a second draw.

InsideTracker's mobile draw adds $119, and New York, New Jersey, Rhode Island, Arizona, and Hawaii residents must take it. Function runs at-home draws in select locations only. Fees vary, and the New York and New Jersey state fee is charged when you arrive for the draw. Both memberships are HSA/FSA eligible, with InsideTracker's handled through Truemed.

Biological age: included or an add-on

Function Health bundles a Biological Age test into the membership and repeats it with each of the two draws, while InsideTracker sells its InnerAge score as an add-on for $99.

Function derives its number from Phenotypic Age, and the second draw gives it a second reading inside the same year.

InnerAge uses 17 biomarkers for men and 13 for women, and each calculation is billed separately. It is also unavailable with category testing, so a member who only buys Category Tests cannot add it.

How do Function Health and InsideTracker turn results into a plan?

Function Health routes your results through clinicians, and InsideTracker routes them through software and a science team.

Function's first results typically arrive within 48 hours of testing. The plan arrives after clinician review. Function sets no timeline for it, and one reviewer reports a three-to-four-week wait.

InsideTracker's results land within 7 business days. Its engine then scores your markers and proposes habit changes, and Terra answers questions in conversation. Per its help center, InsideTracker encourages members to discuss results with a healthcare provider.

Get 100+ biomarkers tested, in-lab or at home

One membership, one blood draw. Get a full picture of your health and the action plan you need to improve it.

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Get 100+ biomarkers tested, in-lab or at home

One membership, one blood draw. Get a full picture of your health and the action plan you need to improve it.

Book your testLoading...

Where are Function Health and InsideTracker tests available?

Function's 2,000+ draw locations span 48 states, and Hawaii, Rhode Island, and Puerto Rico fall outside them.

InsideTracker draws at partner lab locations across the US, and five jurisdictions need a mobile phlebotomist instead. Per its testing-location help page, state law blocks third-party lab slips in New York, New Jersey, Rhode Island, Arizona, and Hawaii. Canadian members use a mobile draw too, without insulin testing.

Who is Function Health best for, and who is InsideTracker best for?

Function Health is best for:

• People who want two scheduled draws without paying per test.
• People who want biological age included.
• People who want first results within 48 hours of testing.

InsideTracker is best for:

• People who already hold DNA or lab results elsewhere and want them analyzed together.
• People who want to buy single Category Tests for one health area.
• People comfortable with a plan built from recommendations instead of a clinician read.

The bottom line

Function Health and InsideTracker both give you a blood-based plan. Function packs two draws, a Biological Age test, and clinician review into $365. InsideTracker asks $489 for a membership plus one test, and offers DNA and result uploads, Category Tests, and a Terra AI guide.

Both models stop short of the end of the plan. Neither prescribes, and neither sells the supplements it points to: Function's SuppCo gives guidance, and InsideTracker gives recommendations.

Superpower charges $199 a year, the lowest of the three, beside Function's $365 and InsideTracker's $489 for a membership plus one Ultimate test. Superpower AI builds your Superpower Protocol from one draw of 100+ biomarkers, your wearables, and your records, with AI and care team support on call. The supplements a plan points to sit in the marketplace at up to 20% off, alongside add-on tests and scans, and prescriptions are available there when clinically appropriate, priced separately. Superpower reports that 93% of members found their action plan more useful, even life-changing, than a yearly checkup.

Blood work is where a health plan starts, not where it ends. Build your home for health with Superpower today.