Function Health

What it is

Function Health is a US-based, subscription, direct-to-consumer service (~$500/year) providing biannual blood draws covering ~100 biomarkers across cardiovascular, metabolic, hormonal, nutrient, immune, and toxin-burden categories. Results come with software-driven interpretation and physician oversight (variable by state).

Strengths

• Single-fee, broad panel access for adults whose insurance doesn’t cover comprehensive testing.
• Useful for trend tracking; biannual cadence catches drift.
• Includes uncommon-in-routine-panels markers (e.g. apoB, Lp(a), heavy metals, full thyroid).
• Convenient logistics.

Trade-offs

• Software interpretation cannot replace clinician judgement; recommendations are generic.
• “Optimal range” markings vary by source and can drive over-testing or over-treatment of values within normal range.
• Out-of-pocket cost; no insurance reimbursement.
• Some marketing material runs ahead of evidence on what individual biomarker shifts mean.

How to use it well

• Treat individual values as data, not diagnosis.
• Discuss concerning results with a qualified clinician who knows your history.
• Use it as a longitudinal tracker, not a one-time screen.
• Don’t supplement on the basis of a single result.

Related entries

ApoB, Lp(a), Healthspan Clinic, Modern Age.