Biological Age & Longevity Calculator.
Discover your true biological age, measure your pace of aging, and learn evidence-based ways to extend your healthy lifespan through clinical nutrition and targeted lifestyle shifts.
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Frequently Asked Questions
What is biological age and how is it different from chronological age?
Chronological age is simply how many years you have been alive. Biological age — also called phenotypic age — reflects how old your body actually functions at a cellular and systems level. Two people who are both 45 years old can have biological ages of 38 and 55 respectively depending on their lifestyle, metabolic health, sleep, and physical function. Biological age predicts health outcomes and longevity risk far better than chronological age.
How accurate is DietXP's Biological Age Calculator?
DietXP's calculator uses a phenotypic and functional biomarker algorithm inspired by Levine PhenoAge and the DunedinPACE pace-of-aging framework from the NIA Joint Symposium 2024. It is not an epigenetic DNA methylation clock. It uses validated digital biomarkers proven to predict all-cause mortality. Treat the result as a clinically-grounded estimate, not a diagnostic test.
What is Pace of Aging?
Pace of Aging measures how many biological years you age per calendar year. A pace of 1.0x is average. 0.85x means you age 15% slower. Above 1.1x indicates accelerated aging. This concept is based on the DunedinPACE epigenetic clock developed by Belsky et al.
Can I reverse my biological age?
Yes. Multiple clinical studies show biological age is modifiable. Key interventions: 150+ mins/week vigorous exercise (preserves telomeres), 7–8 hours sleep (glymphatic clearance), healthy BMI (reduces AGEs), and sequential eating — fiber → protein → carbs — which blunts glucose spikes by up to 40%.
Why does the One-Leg Balance Test matter for longevity?
A study by Araujo et al. (BJSM) found adults who couldn't hold a 10-second one-legged stance had an 84% higher all-cause mortality risk over 7 years. The test is a proxy for neurological integrity, proprioception, and musculoskeletal health — all key dimensions of functional biological age.
⚕️ For educational purposes only. This tool provides a phenotypic and functional age estimate, not an epigenetic DNA methylation test. Individual health trajectories vary. Always consult your healthcare provider or a registered clinical dietitian before making significant changes to your diet or exercise routines.