Function Health vs InsideTracker: $365 a year vs $489 and up

Last updated September 3, 2026.

Function Health and InsideTracker both turn blood work into health advice, but they price and package it very differently. Function Health is a flat $365 per year for a large panel. InsideTracker sells memberships bundled with blood tests, starting at $489 for the year.

What does each one cost?

Function Health charges $365 per year, billed annually, framed as $1 per day. InsideTracker's store lists Membership + Ultimate Blood Test at $489 including the annual platform fee, with bundles of two Ultimate tests at $829 (marked down to $761) and four tests at a 15% saving. Function is cheaper on sticker price. InsideTracker's bundles make sense if you want to retest multiple times a year.

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What do you actually get?

Function Health starts you with 160+ lab tests detecting signals across 1,000+ conditions, at home or at more than 2,000 partner labs. InsideTracker's Ultimate panel looks at up to 54 biomarkers and layers on personalized nutrition and lifestyle recommendations, which has been its specialty since 2009. Function wins on raw panel size per dollar. InsideTracker wins if you want a longer-established nutrition-focused recommendation engine and frequent retesting.

Which one should you pick?

If you want the biggest panel at the lowest annual price, Function Health. If you want nutrition-driven recommendations and quarterly retesting, InsideTracker's bundles are built for that. Neither replaces a doctor; abnormal results deserve a clinician who knows you. Pymander, the free text-first AI doctor behind this site, can help you read lab results for free, and its safety escalation logic is documented in its safety architecture working paper.

What a Pymander AI doctor consult looks like

You said your vitamin D came back low on your last panel. What was the exact level, and are you taking any supplement right now?

It was 21. I take a gummy multivitamin most days but nothing specific for D. I work from home and barely see the sun.

Thanks for giving me all this information. Based on what you've said, a level of 21 is worth treating, and I will walk you through supplement dosing ranges and when to recheck. Here's your care note to share with your care team.

Care note

Low vitamin D, supplement plan

Vitamin D 21, minimal sun exposure. Daily D3 supplement at an appropriate dose, recheck in about three months. Very high doses need clinician guidance.

View care note →

Illustrative example, not a real member's messages.

Common questions

How much does Function Health cost?

$365 per year, billed annually, per its own site, including 160+ lab tests per year.

How much does InsideTracker cost?

Per its store page, Membership + Ultimate Blood Test is $489 including the annual platform fee; bundles with two tests run $829 (discounted to $761) and four tests save 15%.

Which tests more biomarkers?

Function Health advertises 160+ lab tests. InsideTracker's Ultimate panel covers up to 54 biomarkers with an emphasis on nutrition-related markers. Compare the actual test lists before buying.

Do either accept insurance?

Both are cash-pay services priced outside insurance.

How often can you retest?

Function Health includes annual testing. InsideTracker sells multi-test bundles for people who want to retest two to four times per year.

Do these replace a doctor?

No. Both interpret labs and suggest lifestyle changes. Diagnosis and treatment still need a clinician, and a free AI doctor like Pymander can help you understand results in the meantime.

Sources

Pymander is not a replacement for a physician and does not provide medical advice, diagnosis, or treatment.