suppdoc.io vs Function Health
Function runs 100+ lab tests to show you what's happening inside; suppdoc is free and turns lab results (theirs or anyone's) into a supplement plan.
Function Health is a lab-testing membership ($365/year for 100+ biomarkers at signup plus a 60+ marker mid-year retest, with clinician review). It tells you what your bloodwork shows. suppdoc.io is downstream and free: upload a lab report (from Function or any provider) to our bloodwork tool and we match flagged markers to evidence-based supplements, then point you to specific products. They're complementary, Function for testing, suppdoc for what to do about the results.
Feature-by-feature
Where Function Health shines, and where it falls short
- Genuinely comprehensive lab panel (100+ biomarkers) twice a year
- Clinician review and a clear action plan
- Tracks change over time with a mid-year retest
- No doctor visit required to order testing
- Annual membership cost (testing infrastructure isn't free)
- It's testing-first, the supplement guidance is a lighter add-on
- US-focused lab network
People who want comprehensive lab testing and longitudinal biomarker tracking with clinician oversight.
If you already have recent bloodwork (from Function or your own doctor) and want a free, deeper supplement plan from it, upload it to our bloodwork tool. Use both: test with Function, plan with suppdoc.
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No signup, no subscription. Get a personalised stack and decide for yourself.