Discover your biological age using the Klemera-Doubal method
Upload PDFs, images, CSV, or ZIP files with your lab results
Your data is processed locally and never stored or transmitted.
Note: PDF extraction may have errors. Some values may differ from your report due to automatic unit conversions (e.g., CRP from mg/dL to mg/L). Please verify before calculating.
* Required — reference ranges differ by biological sex in NHANES III.
For educational purposes only. Not medical advice.
Upload lab reports (PDF, images, CSV, or ZIP) from different dates to track your biological age over time.
Your data is processed locally and never stored or transmitted.
* Required — reference ranges differ by biological sex in NHANES III.
Track how your interventions are impacting your biological age over time. The shaded area shows the gap - green means you're aging slower, orange means faster. Labels show the exact difference.
Green = reducing biological age, Orange = adding years. Underlined = unusual value (>2 SD from your average).
Each biomarker tells a story about your health. Learn what they mean and how to optimize them.
The longevity targets below are educational benchmarks from the scientific literature — they are not direct inputs to your biological age. TrueAge uses the Klemera-Doubal method, which models how each biomarker relates to chronological age in a reference population. Each marker carries a different statistical weight, so a value within its target can still shift your estimated age depending on your full profile.
A protein made by the liver. It helps keep fluid in your bloodstream and carries hormones, vitamins, and other substances throughout the body.
Longevity Target: 4.3–5.0 g/dL
↑ Higher values within the reference range may be associated with adequate protein intake, good liver function, and lower inflammation
↓ Lower values may be associated with low protein intake, chronic inflammation, liver disease, kidney loss, or other medical conditions
An enzyme found mainly in the liver, bile ducts, and bones.
Longevity Target: 40–80 U/L
↑ Higher values may be associated with liver or bile duct disorders, increased bone turnover, or certain medications
↓ Lower values can occur with malnutrition, hypothyroidism, zinc deficiency, or other causes
A waste product from normal muscle metabolism. Your kidneys filter it from the blood, so it reflects both muscle mass and kidney filtration.
Longevity Target: 0.8–1.1 mg/dL
↑ Higher values may be associated with dehydration, reduced kidney filtration, greater muscle mass, recent meat intake, or recent intense exercise
↓ Lower values may be associated with lower muscle mass or reduced creatinine production
Measures your average blood sugar over the past 2-3 months. It reflects long-term glucose exposure.
Longevity Target: 4.8–5.2%
↑ Higher values may be associated with higher average blood glucose, insulin resistance, diabetes, poor sleep, excess body weight, or inactivity
↓ Lower values usually reflect lower average blood glucose, though unusually low results can sometimes be affected by red blood cell turnover
A protein made by the liver that rises in response to inflammation.
Longevity Target: <1 mg/L
↑ Higher values may reflect inflammation, infection, tissue injury, obesity, smoking, or other causes
↓ Lower values are generally consistent with lower inflammatory activity
Measures the total number of white blood cells circulating in your blood.
Longevity Target: 4.5–7.0 x10^9/L
↑ Higher values may be associated with infection, inflammation, smoking, stress, corticosteroid use, or other causes
↓ Lower values may reflect reduced white blood cell production, viral illness, medication effects, or other causes
Measures the average size of your red blood cells.
Longevity Target: 82–92 fL
↑ Higher values may be associated with vitamin B12 or folate deficiency, alcohol use, liver disease, hypothyroidism, or some medications
↓ Lower values may be associated with iron deficiency or thalassemia traits
Measures the variation in size among your red blood cells.
Longevity Target: 11.5–13%
↑ Higher values may be associated with iron, B12, or folate deficiency, inflammation, oxidative stress, or mixed red blood cell populations
↓ Lower values within the reference range generally indicate more uniform red blood cell size
Measures the percentage of lymphocytes among your total white blood cells.
Longevity Target: 28–38%
↑ Higher values may be seen with some viral infections, certain immune conditions, or other causes
↓ Lower values may be associated with acute stress, corticosteroid exposure, some infections, smoking, or immune suppression
Biological age reflects how well your body is functioning compared to others your chronological age. Unlike chronological age (years since birth), biological age can be influenced by lifestyle, diet, exercise, and other factors.
This calculator uses the Klemera-Doubal Method (KDM) , a scientifically validated approach that estimates biological age by analyzing how your biomarkers compare to age-related changes observed in a large reference population.
Note: Reference ranges are based on biological sex in NHANES III and may not fully reflect individuals on hormone therapy.
Biological < Chronological
Aging slower
Biological ≈ Chronological
Typical pace
Biological > Chronological
Consider changes
Built with R Shiny and the BioAge package. For educational purposes only.