Free, Self-Service “Longevity Clinic”
Longevity clinics are only for the top 1%,
so I'm building a free one for everyone.
so I'm building a free one for everyone.
Zsolt Szabo
Precision Health Consultant for Longevity Clinics, Biohacker, and Software Engineer
Precision Health Tools
Calculators and interpreters to help you optimize your health
Bio-age calculators
Resources
Interpreters
beta
Iron Status Interpreter
Calculates Body Iron Stores and provides a personalized intervention plan.
new
Liver Function Blood Test Interpreter
Comprehensive liver function test interpretation tool that automatically calculates key liver health indexes and provides recommendations based on official clinical guidelines.
coming soon
Grip Strength Interpreter
Discover your grip strength percentile, evaluate its impact on mortality, and estimate the risk of future muscle weakness.
coming soon
Glucose Metabolism Interpreter
Provides a comprehensive metabolic assessment of blood glucose control using a static multi-biomarker approach.
coming soon
Body Weight Interpreter
Analyzes body weight using multiple indexes, evaluates its impact on longevity, and calculates the optimal weight. Provides evidence-based nutrition and weight-loss recommendations.
coming soon
Thyroid Function Interpreter
Provides a comprehensive assessment of thyroid function tests (TSH, fT4, fT3, and rT3) to help detect thyroid dysfunction early.
coming later
Blood Pressure Interpreter
Guided protocols for measuring blood pressure in various positions and comprehensive analysis of results.
coming later
ASCVD Risk Estimator
Estimates the risk of Atherosclerotic Cardiovascular Disease by analyzing key risk factors.
coming later
OGGT Interpreter
Guided protocol for interpreting dynamic blood glucose tests using a CGM at home, or through glucose and insulin measurements in a lab.
Have an idea for a new tool? .
Optimal Biomarker Ranges
Lab reference ranges for optimal health
Liver and Gallbladder
Tumor
The "normal" range on your lab result indicates what's common, not what's healthy.
Calculated Indexes
Standalone calculators that complement my full interpretation tools
ANI
ALD/NAFLD Index is used for distinguishing Alcoholic from Nonalcoholic Fatty Liver Disease.
C-peptide/insulin
C-peptide to insulin molar ratio is helpful in detecting exogenous insulin use, impaired hepatic insulin clearance and impaired C-peptide clearance by the kidneys.
D/T Bilirubin Ratio
The D/T ratio is used to differentiate between different types of jaundice and liver injury patterns.
FIB-3
The Fibrosis-3 Index is an improved version of the FIB-4, that does not include age. It outperforms both FIB-4 and APRI.
FLI
Fatty Liver Index is one of the best models to predict liver fat content.
FT3/FT4 molar ratio
A crude proxy for peripheral T4-to-T3 conversion (deiodinase activity).
fT3/rT3 ratio
Free T3 to reverse T3 ratio reflects the balance between thyroid hormone activation (T4→T3) and inactivation (T4→rT3).
HOMA-IR
HOMA1-IR has a poor correlation (r = -0.60) with the gold standard - Glucose clamp index of insulin sensitivity.
LSS
Liver stiffness score is currently one of the best models to predict liver fibrosis. Outperforms FIB-4, APRI and HSI. Trained on NHANES dataset.
PTFQI
Quantifies pituitary TSH sensitivity to free T4 using standardized z-scores, improving stability at extreme hormone values.
PTFQI-FT3
Quantifies pituitary TSH sensitivity to free T3 using standardized z-scores, improving stability at extreme hormone values.
QUICKI
QUICKI correlates well (r = 0.78) with the gold standard - Glucose clamp index of insulin sensitivity
R-Factor
R-Factor is used for distinguishing acute liver injury (Hepatocellular from Cholestatic). Often used when drug induced liver injury (DILI) is suspected.
SPINA-GD
Estimate of peripheral T4 to T3 conversion.
SPINA-GT
Estimated maximum thyroid hormone production capacity under TSH stimulation.
Triglyceride/HDL
Triglyceride-to-HDL ratio is a surrogate marker of insulin resistance, NAFLD and atherogenic dyslipidemia.
TSHI
Quantifies pituitary TSH sensitivity to free T4.
TyG
Triglyceride-glucose index is an inexpensive non-insulin surrogate marker of insulin resistance.
TyG-BMI
Triglyceride-Glucose index multiplied by BMI is one of the best models to predict NAFLD.
Please send me relevant research and feedback.
Any feedback is welcome at .
I am particularly interested in research on biomarkers associated with all-cause mortality and on defining optimal reference ranges.