Function Health vs. InsideTracker

The Matchup

Breadth versus brains. Function Health leads the category on raw measured breadth — 100+ biomarkers at enrollment plus 60+ mid-year follow-ups — and frames itself as the comprehensive longevity-bloodwork standard. InsideTracker leads on the personalization engine: a narrower 43-biomarker Ultimate panel run through proprietary algorithms built by a Harvard/Tufts/MIT scientific advisory board, an InnerAge biological-age score, and DNA-integrated action plans. The oldest brand in the category (2009) against the breadth-defining one (2021) — the choice is whether you want more numbers or a more opinionated interpretation of fewer.

Head-to-Head Comparison

Feature	Function Health	InsideTracker
Listed price	$365–$499/yr	$99–$340
Biomarkers (flagship)	100+ at enrollment (+60 mid-year)	43 (Ultimate panel)
Biological-age score	No	InnerAge
Personalization engine	Clinician review + action plan	Algorithmic (academic advisory board)
DNA integration	Add-on advanced tests	DNA kit or 23andMe/Ancestry upload
Entry-level option	Single broad annual panel	Category mini-panels from $99
Founded	2021	2009
Lab draw	In-person Quest (2,000+ locations)	Lab draw network
FDA status	Not cleared (LDT)	Not cleared (LDT)
Markets	US only	US only

Where Function Health Wins

• More than double the measured breadth. 100+ enrollment biomarkers plus 60+ mid-year is roughly 2.5× InsideTracker’s 43-marker Ultimate panel. For the broadest organ-system snapshot, Function is structurally ahead.
• Clinician-reviewed action plan. A human clinician reviews results and produces the plan, rather than leaning entirely on an algorithm — reassuring for buyers who want a person in the loop.
• Quest draw depth. 2,000+ Quest locations make the in-person draw easy almost anywhere in the US.
• Category-defining recognition. The Mark Hyman halo makes Function the default name buyers reach for in comprehensive longevity bloodwork.
• Built for “test everything once a year.” The model is breadth-first: one wide annual sweep plus a mid-year recheck.

Where InsideTracker Wins

• Strongest personalization science in the category. The Harvard/Tufts/MIT advisory board and proprietary algorithms turn results into specific, prioritized nutrition, supplement, and lifestyle actions — not just a flagged-out-of-range list.
• InnerAge biological-age score. Function doesn’t compute a biological age; InsideTracker does, which is exactly the single-number longevity signal many buyers want for trend tracking.
• Cheapest serious entry point. Category mini-panels from $99 let buyers test a specific concern (e.g. metabolic or inflammation) without paying for a full broad panel.
• DNA-integrated recommendations. A DNA kit or 23andMe/Ancestry upload personalizes guidance against your genetics — a layer Function doesn’t natively build into its plan.
• Longest operating history. 2009-founded with the deepest longitudinal track record and academic credibility in the category.

The Breadth-vs-Personalization Trade-Off

The two platforms optimize opposite ends of the same workflow.

Buyer goal	Better fit
Maximum measured biomarkers per cycle	Function Health
Most actionable, science-ranked recommendations	InsideTracker
A single biological-age number to track	InsideTracker
Broadest annual organ-system snapshot	Function Health
Cheapest way to test one specific concern	InsideTracker ($99 mini-panels)
DNA-personalized guidance	InsideTracker

Function measures more; InsideTracker does more with what it measures. Power users sometimes find InsideTracker’s recommendations generic — but for buyers who want their results turned into a ranked plan rather than a raw breadth dump, the personalization engine is the product.

The Cost Structure

Use case	Function Health	InsideTracker
Broad annual panel	~$499/yr	~$340 (Ultimate)
Single-concern check	(no mini-panel)	from $99
Biological-age tracking	not included	InnerAge included

For one wide yearly sweep, Function delivers the most biomarkers per dollar on breadth. For targeted testing, biological-age tracking, or science-ranked guidance, InsideTracker’s tiered panels and personalization are the better spend.

The Verdict — More Numbers vs Smarter Numbers

Choose Function Health if:

• You want the widest measured biomarker breadth per cycle
• You prefer a clinician-reviewed plan over a purely algorithmic one
• You value the category-defining brand and Quest draw convenience
• Your goal is “test everything” once or twice a year

Choose InsideTracker if:

• You want the strongest personalization engine and science-ranked actions
• You want an InnerAge biological-age score to track over time
• You want a cheap targeted entry ($99 mini-panels) or DNA-integrated guidance
• You value the longest academic track record in the category

The honest middle case: if breadth is the goal — the most biomarkers measured per year — Function Health wins outright. If you’d rather have fewer markers turned into a sharper, biological-age-anchored, DNA-aware plan, InsideTracker is the more useful tool. Many serious buyers run Function for breadth and InsideTracker for the InnerAge trend line; they’re complementary as often as they’re competitive.

We’ll update this comparison after independent verification of each platform’s measured-analyte count and InnerAge methodology.

Related Reading

• Function Health Review — full deep-dive
• InsideTracker Review — full deep-dive
• Function Health vs Superpower — the lawsuit-defining comparison
• Function Health vs Lifeforce — data-only vs closed-loop concierge
• At-Home Blood Tests Hub — full category overview

Changelog

• 2026-06-05: Initial comparison published.