Biological Age Calculator
Your biological age reflects how well your body is actually aging, which can be very different from your birth certificate. Answer a few questions to estimate yours.
What is biological age?
Your chronological age is simply how many years you've been alive. Your biological age reflects how old your body actually is at a cellular level, based on factors like DNA methylation, telomere length, metabolic function, and organ health.
Two people born in the same year can have dramatically different biological ages depending on genetics, lifestyle, stress, diet, sleep, and environmental exposures. Research shows that biological age is a far better predictor of healthspan and disease risk than chronological age alone.
NAD+ is a key biomarker of biological aging. This coenzyme, found in every cell, powers over 500 enzymatic reactions including DNA repair, mitochondrial energy production, and sirtuin activation. NAD+ levels decline steadily with age, and restoring them is one of the most promising interventions in longevity science.
This calculator provides an estimate based on lifestyle factors. For a clinical measurement, epigenetic testing (like DNA methylation clocks) can give a precise biological age reading.
How accurate is this calculator?
This is an educational estimate based on well-established lifestyle factors that influence aging. It is not a clinical test. For a precise biological age measurement, epigenetic clocks like GrimAge or Horvath's clock analyze DNA methylation patterns and are considered the gold standard.
Can I lower my biological age?
Yes. Research shows that lifestyle interventions can meaningfully reduce biological age. Regular exercise, quality sleep, stress management, a nutrient-dense diet, and targeted supplementation (including NAD+ precursors) have all been shown to slow or partially reverse biological aging markers.
What role does NAD+ play in aging?
NAD+ (nicotinamide adenine dinucleotide) is essential for cellular energy production, DNA repair, and the activation of sirtuins\u2014proteins that regulate aging. By your 40s, NAD+ levels can drop by more than 50%, contributing to fatigue, cognitive decline, metabolic slowdown, and accelerated aging. Supplementing with NAD+ precursors like nicotinamide riboside can help restore these levels.