Five free interactive tools from Harland Reed. No fluff, no generic charts — each one shows your real baseline so you can act on it. Pick yours, drop your email, and it's yours.
Calculator
Biological Age & Longevity Baseline
Most longevity protocols fail because they treat a 50-year-old like a 20-year-old. This interactive diagnostic analyzes your sleep, stress, mobility and lifestyle markers to calculate your true biological age vs your chronological age.
Estimator
Metabolic Rate & Insulin Sensitivity
Standard caloric equations break down after 50. Plug in your daily metrics to discover your exact metabolic baseline, target macronutrient ratios, and optimal protein-synthesis thresholds to burn visceral fat without stripping lean muscle.
Tracker
Sarcopenia Risk & Lean Muscle Mass
After 50, muscle drops 1–2% a year. Input your strength, grip and output markers to assess your sarcopenia risk profile and locate exactly where your vulnerabilities lie.
Auditor
Sleep Quality & Cortisol Rhythm
Disrupted sleep and elevated cortisol accelerate cognitive decline. This tracking lab maps your evening stress patterns and sleep latency, and shows the behavioural tweaks that unlock deep, age-reversing recovery.
Proxy test
VO2 Max & Heart-Rate Recovery
VO2 max correlates directly with lifespan. Use non-invasive, home-based step tests and heart-rate recovery windows to estimate your cardiovascular capacity safely — benchmark it, track it, improve it.
Printable one-pagers
Three free, print-ready sheets you can pin to the fridge. No account, no fluff — just the week laid out.
Printable · Checklist
Prime Life Labs Starter Sheet
A simple 7-day movement, protein and recovery checklist for over-50s. One quiet, repeatable week — tick the box each day.