vs
Function combines laboratory testing with an annual membership and a smaller follow-up panel. SiPhox offers home-collected blood testing with digital insights. The detailed comparison starts with Function Membership and SiPhox Ultimate 360, its broader home panel.
At a glance
1 annual membership
2 one-time panels
$365/yr
$149–$274
125 markers
67 again at a follow-up
35–62 markers
- Membership$365/yr125 markers
- Longevity Essentials$14935 markers
- Ultimate 360$27462 markers
Compare offerings
$365/yr
First year
Annual membership
Then $365 per year
$274
One-time purchase
125 markers
67 again at a follow-up
62 markers
What’s included
Markers in each selected offering. Where the other provider sells a marker as an add-on, it’s labelled.
Heart health
- Large HDL Particle Number
- LDL Particle Number (LDL-P)
- LDL Particle Size (peak diameter)
- LDL Pattern
- Medium LDL Particle Number
- Non-HDL Cholesterol (Non-HDL-C)
- Small LDL Particle Number
Metabolic health
- Chloride
- Glucose (fasting)
- Insulin (fasting)
- Leptin
- Potassium
- Heart health7
- Metabolic health1
- Hormones9
- Thyroid5
- Nutrition5
- Inflammation1
- Liver health5
- Kidney health4
- Blood health2
- Proteins2
- Cancer-related markers1
Heart health
- ApoB/ApoA1 RatioMen onlyWomen onlyAdd-on with Function
- Apolipoprotein A1 (ApoA1)Men onlyWomen onlyAdd-on with Function
- LDL-C to ApoB RatioMen onlyWomen only
- LDL-C/HDL-C RatioMen onlyWomen only
- Triglyceride to HDL RatioMen onlyWomen only
- VLDL Cholesterol (VLDL-C)Men onlyWomen only
Metabolic health
- C-PeptideMen onlyWomen onlyAdd-on with Function
- Estimated Average Glucose (eAG)Men onlyWomen only
Hormones
- Cortisol to DHEA-S RatioMen onlyWomen only
- Free Androgen Index (FAI)Men onlyWomen only
- Free Testosterone (percentage)Men only
- LH to FSH RatioWomen only
Getting tested
Function arranges laboratory blood collection. SiPhox Ultimate 360 uses a self-collected upper-arm sample returned by mail. Function includes a smaller follow-up panel; the selected SiPhox purchase is one panel.
Included
Not offered
Extra fee—amount not published
Additional fee varies by location and is paid during scheduling; address availability applies.
Not offered
Not offered
Mail-in kit: Included
Results and help
Function includes written clinician review and results tracking. SiPhox provides expert-reviewed out-of-range highlights, personalized insights and an action plan. SiPhox’s live help covers taking the sample; its results insights are delivered in writing.
Biomarker values with explanations, action items and a written clinician summary.
A digital biomarker dashboard with PDF results and personalized insights.
Web · iPhone · Android · Download results as PDF and upload previous records
Web · PDF results
First results typically begin within 48 hours; the full panel and written review arrive progressively.
Typically 7–10 days.
Clinician review AI assistant Contact about concerning results
—
Cost and terms
Function renews annually and includes its follow-up testing. The selected SiPhox Ultimate 360 purchase is a one-time kit; recurring testing is a separate option. Compare the testing schedule as well as the upfront payment.
Purchase: $365
Purchase: $274