Bio-Aging Reversal Checker

Calculate your Biological Age Delta. How much are your interventions actually reversing your biological clock?

Bio-aging reversal checker — track your biological age and rejuvenation

Your Ages

From GrimAge, Horvath clock, or lab test

Active Interventions

Estimated Biological Age
0
Age Delta
0 yrs
Intervention Score
0/10

Analysis

// The Concept
Bio-Age Delta = Chronological Age − Estimated Biological Age
A positive delta means your cells are biologically younger than your passport age · Negative means older
2.0 yrs

Zone 2 cardio

Estimated biological age reduction from 4+ hrs/week Zone 2 training

1.5 yrs

Resistance training

Estimated reduction from 3× weekly resistance training

1.5 yrs

Caloric restriction

Estimated reduction from precise calorie tracking and mild CR

10/10

Max protocol score

Full intervention score from all combined evidence-based practices

Evidence Base

Exercise Beats Supplements

Both resistance and aerobic exercise consistently reduce epigenetic age in multiple studies. VO₂ max improvement is the single most measurable biological age intervention available to most people. Lifestyle changes have better evidence than any supplement. What gets measured, gets managed — track your biomarkers before and after interventions.

// The science of reversal

Can Biological Ageing Actually Be Reversed?

Current evidence suggests some ageing processes can be slowed, halted, or partially reversed — particularly epigenetic changes, mitochondrial function, and metabolic health markers. Measurable improvements in biological age clocks have been demonstrated in clinical trials combining diet, exercise, and sleep optimisation.

The most cited example: a 2021 TRIIM trial showed an average 2.5-year reduction in epigenetic age over 1 year using a combination of growth hormone, DHEA, and metformin. Non-pharmaceutical interventions show smaller but consistently positive effects.

Important: This calculator provides educational estimates based on population-level research. Individual results vary. The delta is an approximation — clinical epigenetic testing (TruAge, SirenDx) provides validated measurement.

// Interventions by evidence strength

What Actually Works

Strong evidence (exercise)

Both resistance and aerobic exercise consistently reduce epigenetic age in multiple studies. VO₂ max improvement is the single most measurable biological age intervention available to most people.

Good evidence (diet & fasting)

Plant-rich, calorie-optimised diets reduce multiple ageing biomarkers. Caloric restriction reduces inflammation, improves insulin sensitivity, and slows epigenetic ageing in animal models. Human data is supportive but less definitive.

Promising (advanced protocols)

Rapamycin extends lifespan in multiple animal models; human trials are ongoing. Senolytics (dasatinib + quercetin) show promise in early trials. NAD+ precursors (NMN/NR) improve markers in some studies. None are proven for lifespan extension in humans yet.

// Common Questions

Frequently Asked Questions

Current evidence suggests some ageing processes can be slowed or partially reversed — particularly epigenetic changes, mitochondrial function, and metabolic health markers. Measurable improvements in biological age clocks have been demonstrated in clinical trials. Full reversal of systemic ageing remains beyond current medicine.
Strongest evidence: (1) resistance and aerobic exercise — both reduce epigenetic age; (2) caloric restriction — reduces multiple ageing biomarkers; (3) Mediterranean-style diet; (4) sleep optimisation. More speculative: rapamycin, senolytics, NAD+ precursors. Lifestyle changes have better evidence than any supplement.
Dysfunctional cells that have stopped dividing but resist death. They accumulate with age and release inflammatory signals ('SASP') that damage surrounding tissue. Clearance of senescent cells (senolysis) extends healthy lifespan in animal models and is an active area of human clinical research.
NAD+ levels decline with age, reducing mitochondrial function and DNA repair. Precursors such as NMN and NR increase NAD+ levels in humans. Early clinical data shows improvements in some metabolic and muscle function markers. Whether this translates to meaningful healthspan benefits remains under active investigation.
Track objective biomarkers: epigenetic age tests (TruAge, SirenDx), VO₂ max, fasting glucose, HbA1c, hs-CRP, grip strength, body composition, and sleep quality. Before-and-after testing at 3–6 month intervals provides the most meaningful signal.
Zone 2 is low-intensity, sustained aerobic exercise (60–70% max heart rate; you can hold a conversation but are slightly breathless). It maximally stimulates mitochondrial biogenesis and improves VO₂ max — the strongest single predictor of all-cause mortality across all age groups.
GrimAge and DunedinPACE (pace of ageing) are the most validated clocks for predicting mortality and disease. They have standard errors of 3–5 years. They measure methylation patterns across hundreds of CpG sites in your DNA. For tracking your own change over time, they are more useful than for absolute age estimation.
Rapamycin is an mTOR inhibitor that extends lifespan in multiple animal species — the most robust pharmacological finding in longevity research. Some physicians now prescribe it off-label in low intermittent doses. Side effects at high doses include immunosuppression; at low longevity doses the profile appears more benign. Consult a longevity physician before considering it.
// Methodology & References

Formula & Calculation Method

Biological Age Delta

Δ_bio = Biological_Age − Chronological_Age
  • Biological_Age — Age estimated from biomarkers (epigenetic clocks, blood markers)
  • Chronological_Age — Years since birth
  • Δ_bio — Negative = younger than chronological age (good)

Source: Horvath, S., 'DNA methylation age of human tissues and cell types', Genome Biology (2013)

PhenoAge (Levine, 2018)

PhenoAge = f(albumin, creatinine, glucose, CRP, lymphocytes, MCV, RDW, ALP, WBC, age)

Source: Levine et al., 'An epigenetic biomarker of aging for lifespan and healthspan', Aging (2018)

Authoritative Sources & Standards
  • FDA: FDA has not approved any anti-aging drug for the indication of 'aging itself.' Metformin (TAME trial) and rapamycin remain investigational for healthspan extension. → FDA
  • NIH: NIH National Institute on Aging (NIA) Interventions Testing Program (ITP) tests longevity compounds in mice — rapamycin, acarbose, and 17α-estradiol have shown lifespan extension. → NIH

Expert Insights & Research

Largest validated bio-age reduction interventions: caloric restriction (~3 years younger biological age), exercise (~2–4 years), Mediterranean diet (~2 years). Most supplement claims (NMN, resveratrol) lack human RCT validation as of 2024.

— Fitzgerald et al., 'Potential reversal of epigenetic age', Aging (2021) (2021)

Horvath clock and PhenoAge correlate with all-cause mortality but disagree on individuals. Different clocks measure different aging processes — no single 'true' biological age exists.

— Bell et al., 'DNA methylation aging clocks: challenges and recommendations', Genome Biology (2019) (2019)
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For informational purposes only — not financial, medical, or legal advice. Results are estimates; use at your own risk. Full terms