Function Health vs SiPhox Health
Complete Head-to-Head Comparison
Compare costs, biomarker coverage, and value to find the best blood testing service for your needs
Function Health
Quick Comparison Summary
Best Value
Function Health
43.8 biomarkers per $100
Most Comprehensive
Function Health
160+ biomarkers tested
Most Tests Per Year
SiPhox Health
4 tests/year
Cost & Value Comparison
Function Health
Annual Cost$365
Tests per Year2
Total Biomarkers160+
Cost per Test$182
SiPhox Health
Annual Cost$996
Tests per Year4
Total Biomarkers59
Cost per Test$249
Service Details
| Feature | Function Health | SiPhox Health |
|---|---|---|
| Lab Locations | 2000+ Quest | At-home |
| Key Features | Cancer markers, autoimmune panel (ANA), advanced lipids (ApoB), heavy metals (lead), Omega-3, clinician review | Needle-free EasyDraw device, AI longevity expert (Sai), wearable integrations (Oura/Fitbit/Apple Watch), supplement recommendations, third-party lab uploads |
| Notes | $365/year, single membership tier (reduced from $499; Function announced the $365 price directly). 160+ lab tests 2x/year plus on-demand testing. GRAIL cancer screening, MRI/CT scans, Alzheimer's testing, mold reactivity as add-ons. HSA/FSA eligible. | Priced here as the Ultimate 360 panel, the SKU the 59-biomarker count describes: membership $124 per test cycle plus the Ultimate 360 upgrade at +$125 per cycle, 4 quarterly cycles = $996/yr plus shipping. Membership alone is $124/cycle ($496/yr quarterly) and includes four switchable core panels: Longevity Essentials (25 biomarkers), Thyroid Focus, Hormone Focus, Heart & Metabolic. GLP Monitoring Panel +$75/cycle. At-home needle-free EasyDraw collection. Our 20% affiliate code applies to the first billing cycle only, membership only, excluding shipping and upgrades. HSA/FSA eligible. |
Biomarker Coverage Comparison
46
Tests in Common
59
Only in Function Health
1
Only in SiPhox Health
Tests Only in Function Health
- Hematocrit(Complete Blood Count (CBC))
- Red Blood Cell Count (RBC)(Complete Blood Count (CBC))
- White Blood Cell Count (WBC)(Complete Blood Count (CBC))
- Platelet Count(Complete Blood Count (CBC))
- MCV, MCH, MCHC(Complete Blood Count (CBC))
- RDW (Red Cell Distribution Width)(Complete Blood Count (CBC))
- LDL Particle Number(Lipid Panel / Cardiovascular Health)
- LDL Particle Size(Lipid Panel / Cardiovascular Health)
- Fasting Glucose(Metabolic Health / Glucose)
- Insulin(Metabolic Health / Glucose)
- Uric Acid(Metabolic Health / Glucose)
- GGT (Gamma-Glutamyl Transferase)(Liver Function)
47 more
- Sodium(Electrolytes & Minerals)
- Potassium(Electrolytes & Minerals)
- Chloride(Electrolytes & Minerals)
- Carbon Dioxide (CO2)(Electrolytes & Minerals)
- Magnesium(Electrolytes & Minerals)
- Iodine(Thyroid Function)
- Selenium(Thyroid Function)
- ESR (Erythrocyte Sedimentation Rate)(Inflammation & Immune Markers)
- TIBC (Total Iron Binding Capacity)(Vitamins & Nutrients)
- Omega-3 Index / Fatty Acids(Advanced / Specialty Markers)
- Heavy Metals - Lead(Advanced / Specialty Markers)
- Heavy Metals - Mercury(Advanced / Specialty Markers)
- Creatine Kinase(Advanced / Specialty Markers)
- IGF-1 (Insulin-like Growth Factor)(Advanced / Specialty Markers)
- HOMA-IR (Insulin Resistance)(Advanced / Specialty Markers)
- ANA Screen (Antinuclear Antibodies)(Autoimmune Markers)
- ANA Titer(Autoimmune Markers)
- ANA Pattern(Autoimmune Markers)
- Rheumatoid Factor (RF)(Autoimmune Markers)
- Celiac Disease Panel (Comprehensive)(Autoimmune Markers)
- CEA (Carcinoembryonic Antigen)(Cancer Screening Markers)
- CA-125 (Ovarian Cancer)(Cancer Screening Markers)
- CA 19-9 (Pancreatic/GI Cancer)(Cancer Screening Markers)
- AFP (Alpha-Fetoprotein - Liver Cancer)(Cancer Screening Markers)
- Neutrophil/Lymphocyte Ratio(Additional Specialized Tests)
- HDL Subfractions (Large/Small)(Additional Specialized Tests)
- Cystatin C(Kidney Function)
- Reverse T3(Thyroid Function)
- Pregnenolone(Sex Hormones (Male))
- Mean Platelet Volume (MPV)(Complete Blood Count (CBC))
- Zinc(Electrolytes & Minerals)
- Copper(Electrolytes & Minerals)
- Oxidized LDL (OxLDL)(Lipid Panel / Cardiovascular Health)
- Fibrinogen(Inflammation & Immune Markers)
- Lipase(Liver Function)
- PTH (Parathyroid Hormone)(Electrolytes & Minerals)
- Osteocalcin(Advanced / Specialty Markers)
- Leptin(Advanced / Specialty Markers)
- Adiponectin(Advanced / Specialty Markers)
- C-Peptide(Metabolic Health / Glucose)
- Immature Granulocytes(Complete Blood Count (CBC))
- Apolipoprotein A1 (ApoA1)(Lipid Panel / Cardiovascular Health)
- Neutrophils(Complete Blood Count (CBC))
- Lymphocytes(Complete Blood Count (CBC))
- Monocytes(Complete Blood Count (CBC))
- Eosinophils(Complete Blood Count (CBC))
- Basophils(Complete Blood Count (CBC))
Tests Only in SiPhox Health
- Free Androgen Index (FAI)(Additional Specialized Tests)
Full biomarker tableall 106 markers, side by side
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Frequently Asked Questions
Which is cheaper, Function Health or SiPhox Health?
Function Health is cheaper at $365/year, compared with $996/year for SiPhox Health.
How much do Function Health and SiPhox Health cost per year?
Function Health costs $365/year for 2 tests ($182 per test). SiPhox Health costs $996/year for 4 tests ($249 per test).
Which tests more biomarkers, Function Health or SiPhox Health?
Function Health lists more biomarkers: 160+, compared with 59 for SiPhox Health. Of the markers in our database, 46 are in both panels.
Which gives more biomarkers per dollar, Function Health or SiPhox Health?
Function Health gives more biomarkers per dollar: 43.8 per $100 of annual cost, compared with 5.9 for SiPhox Health. Count alone does not decide it; check whether the markers you need are included.
What does Function Health test that SiPhox Health doesn't?
59 markers in our database are in Function Health's panel but not SiPhox Health's, including Hematocrit, Red Blood Cell Count (RBC), White Blood Cell Count (WBC), and 56 more.
What does SiPhox Health test that Function Health doesn't?
One marker in our database is in SiPhox Health's panel but not Function Health's: Free Androgen Index (FAI).
How many tests per year do Function Health and SiPhox Health include?
Function Health includes 2 tests per year. SiPhox Health includes 4 tests per year.
Where do Function Health and SiPhox Health draw blood?
Function Health: 2000+ Quest. SiPhox Health: At-home.
Can I use insurance with Function Health or SiPhox Health?
Both are direct-to-consumer services paid out of pocket. Some buyers pay with HSA/FSA funds or submit receipts for out-of-network reimbursement; check with your plan and the provider.