Both offer comprehensive bloodwork far beyond a standard physical. The right choice depends on whether you want maximum breadth (Function) or deeper ongoing optimization with action guidance (InsideTracker).
| Feature | Function Health | InsideTracker |
|---|---|---|
| Biomarkers (baseline) | 100+ | 43 (Ultimate) |
| Entry price | ~$499/year membership | $489 (Ultimate test) |
| Retest cost | Included in annual membership | ~$340 per retest |
| Biological age score | ✗ Not available | ✓ InnerAge score |
| DNA integration | ✗ | ✓ 1,500+ markers |
| Wearable integration | ✗ | ✓ Garmin, Apple Health, Fitbit |
| Action recommendations | Dashboard summaries | Personalized daily actions |
| Blood draw method | Quest Diagnostics lab | Lab or mobile draw |
| Women's hormone panels | ✓ Includes AMH | ✓ Women-specific option |
| Best for | Maximum breadth, first baseline | Ongoing optimization, depth |
Function Health is best for people who have never done comprehensive bloodwork and want the most complete picture in a single test. 100+ biomarkers — covering heart, hormones, thyroid, nutrients, toxins, inflammation, and autoimmunity — is genuinely 5x more than a typical physical.
The dashboard is clean and the results are accessible. The relative weakness: the action layer is less developed than InsideTracker. You get a lot of data but less prescriptive guidance on what to change. CreusLife's interpretation guides and protocols fill this gap.
InsideTracker is best for people who want to track their biology over time and get specific, personalized recommendations for improving each marker. The InnerAge biological age score — calculated from your biomarker data and updated with each retest — is genuinely motivating for tracking whether interventions are working.
The DNA integration (1,500+ genetic markers) and wearable sync make it the more comprehensive ongoing platform. If you plan to retest every 6 months and want an app that rewards that behavior, InsideTracker's interface is better suited to it.
If $489–$499 is too much to start: SiPhox Health (~$95, at-home finger-prick, meaningful panel) or Superpower (~$16/month, expanded bloodwork subscription) are solid lower-cost entry points before committing to an annual membership.
Start with Function Health for maximum breadth.
InsideTracker Ultimate with the annual retest cadence.
SiPhox Health or Superpower to start building your baseline.
Either platform — both include women's hormone panels. InsideTracker has a dedicated women's option.
Answer 6 questions and get a personalized measurement path, supplement stack, and 90-day protocol.