How It Works
Your birth date tells you how many years you've been alive, but it doesn't always reflect how well your body is actually aging. Our biological age test helps you understand how your current health and lifestyle compare to typical people your age, so you can spot risks early and make smarter choices for the future.
Understand Your Body
Biological age is an estimate of how "old" your body appears based on health, function and risk factors, not just the number of years you've been alive. Two people who are both 50 in calendar years can have very different biological ages depending on their blood pressure, fitness, nutrition, stress and medical history.
Simply the number of years since you were born. It ticks forward at a fixed, unavoidable rate.
Reflects how far age-related changes have progressed in your body and organs. It is fluid and influenced by lifestyle, environment, and health factors.
Chronological age is simply the number of years since you were born. Biological age reflects how far age-related changes have progressed in your body and organs — some systems can age faster or slower than others. For example, someone in their 30s with a biological age of 50 has health characteristics more similar to a typical 50-year-old, while another person in their 50s might have a biological age closer to 40 thanks to healthier habits and lower risk factors.
A higher-than-expected biological age is often associated with increased risk of heart disease, certain cancers, diabetes and other age-related illnesses. On the other hand, a younger biological age tends to reflect better cardiovascular fitness, metabolic health, mental well-being and overall resilience.
You cannot literally "turn back the clock" to become biologically identical to a much younger person, but you can often slow or sometimes partly reverse accelerated aging by improving factors like physical activity, diet quality, sleep, stress management and social support.
Assessment Criteria
We base your biological age estimate on a broad set of science-based risk and protective factors from your everyday life. Together, these factors help us approximate how your current profile compares with typical patterns of aging in large populations.
We start with core personal characteristics that influence your baseline risk.
Age and sex are among the strongest predictors of many health outcomes, especially heart and metabolic diseases. For example, men generally have higher rates of cardiovascular events at younger ages, while women often live longer but may face increased risk of conditions such as osteoporosis later in life.
SourceGenetics contribute to roughly 15-25% of how we age and how long we live. Having parents or grandparents who lived into older age with relatively few chronic diseases can indicate a slightly more favorable genetic background.
SourceHigher educational attainment is consistently linked with better health behaviors, higher health literacy and longer life expectancy across many populations. Education often reflects access to resources, job conditions and the ability to navigate healthcare.
SourceBoth short sleep and poor-quality, fragmented sleep are associated with higher risks of obesity, diabetes, heart disease and mood disorders. Regular, restorative sleep supports immune function, hormonal balance, brain health and cardiovascular recovery.
SourceCardiovascular and lifestyle patterns play a major role in determining biological age.
Elevated blood pressure is a leading modifiable risk factor for heart attacks, strokes and kidney disease, and its impact grows as we age. Keeping blood pressure in a healthy range is strongly associated with slower vascular aging.
SourceHigh levels of LDL ("bad") cholesterol and low levels of HDL ("good") cholesterol contribute to atherosclerosis and earlier heart disease. Improving cholesterol through diet, activity or medication can reduce vascular aging.
SourceSmoking accelerates aging across multiple organs, increases inflammation and dramatically raises the risk of heart disease, stroke, cancer and lung disease. Quitting smoking is one of the single most powerful actions you can take to lower your biological age.
SourceChronic stress and poor stress management are linked to higher blood pressure, metabolic disturbances, sleep problems and mental health issues. Over time, sustained stress can contribute to accelerated biological aging through hormonal and inflammatory pathways.
SourceRegular physical activity improves cardiovascular fitness, muscle strength, metabolic health and mood, and is consistently associated with longer life and lower disease risk. Even moderate increases in daily movement can have measurable benefits.
SourceExisting medical conditions and how you manage them also influence your biological age.
Routine checkups and screening tests help detect problems like high blood pressure, abnormal lipids, cancers and diabetes early, when they are easier to manage. People who engage regularly with preventive care tend to have better long-term health outcomes.
SourceA history of heart attack, angina, heart failure or significant vascular disease indicates that age-related changes have already affected the cardiovascular system. Good treatment and lifestyle adjustments can still improve prognosis.
SourceChronic lung conditions such as COPD or severe asthma can limit activity, reduce oxygen delivery and are associated with increased mortality. Maintaining lung function supports healthier aging.
SourceType 2 diabetes and prediabetes are linked with higher risks of heart disease, kidney damage, nerve problems and other complications. Good blood sugar control, weight management and lifestyle changes can significantly slow biological aging.
SourceCertain medications reflect underlying risk (for example, blood pressure or cholesterol drugs), while others may have side effects that impact weight, metabolism or mood. We use medication information to better understand your current health status.
SourceWhat and how you eat has a powerful effect on long-term health and aging.
Diets rich in whole foods, such as vegetables, fruits, legumes, nuts and whole grains, are associated with lower rates of heart disease, diabetes and certain cancers. Irregular eating patterns can contribute to weight gain and metabolic strain.
SourceHigher intakes of fruits and vegetables provide fiber, vitamins, minerals and phytonutrients that support cardiovascular and immune health. Many longevity studies highlight plant-forward eating as a cornerstone of healthy aging.
SourceDiets heavy in saturated and trans fats are linked to higher LDL cholesterol, heart disease and metabolic problems. Emphasizing unsaturated fats from fish, nuts, seeds and olive oil supports healthier vascular aging.
SourceFrequent consumption of ultra-processed foods high in sugar, salt and refined starch correlates with obesity, hypertension and metabolic disorders. Reducing processed foods can improve biological aging markers over time.
SourceHeavy alcohol use increases the risk of liver disease, certain cancers, high blood pressure and accidents. Most health guidelines recommend moderation or avoidance for optimal aging.
SourceMental and emotional well-being are closely linked with physical health and aging.
Higher levels of life satisfaction and positive affect are associated with better immune function, lower inflammation and reduced risk of some chronic diseases. Feeling generally happy often co-occurs with supportive relationships and healthier behaviors.
SourceChronic anxiety activates stress pathways that can accelerate biological aging through hormonal dysregulation and inflammation. Managing anxiety through therapy, mindfulness or other approaches supports both mental and physical health.
SourceDepression is consistently linked with higher risks of cardiovascular disease, metabolic disorders and cognitive decline. Addressing depression through professional support, lifestyle changes and social connection can have wide-ranging health benefits.
SourceStrong social connections are associated with longer life, better immune function and lower rates of chronic disease. Conversely, social isolation and loneliness are risk factors for poor health outcomes across many studies.
SourceJob satisfaction, work-life balance and a sense of purpose are all linked to better health outcomes. Feeling fulfilled in your daily activities supports mental health and encourages healthier lifestyle choices.
SourceTake our free assessment now and see how your lifestyle is affecting your biological age. No sign-up needed, completely private, and you will get your results instantly.