01/22/2026
U.S. life expectancy peaked around 2014, reaching its highest recorded level of 78.9 years. It then began declining due to factors like COVID-19, drug overdoses, and homicides. The good news is that life expectancy rose to 79.4 years in 2025. Still, more than a decade later, we've only added about six months to life expectancy.
It's important to focus on the quality, not the quantity, of your years and your life, in totality. So many Americans spend the last years of their lives in clear physical decline, going from one doctor’s appointment to the next.
This statistic is telling: About 5% of of Americans account for nearly half of all U.S. healthcare costs, driven by chronic conditions, while the bottom 50% of the population accounts for only about 3% of spending, according to data from the Peterson-KFF Health System Tracker and Agency for Healthcare Research and Quality. People aged 65+ and those with serious illnesses are disproportionately represented in high-spending groups.
According to the American Heart Association's 2025 Statistics Update:
• Nearly 47% of U.S. adults have high blood pressure.
• More than 72% of U.S. adults have unhealthy weight (currently defined as body mass index ≥25, with nearly 42% having obesity (currently defined as body mass index ≥30).
• More than half of U.S. adults (57%) have type 2 diabetes or pre-diabetes.
According to CDC and other data, approximately 40% of American adults have multiple chronic health conditions, meaning they have at least two chronic diseases.
Nearly 60% of adult Americans have at least one chronic disease.
Five of the top 10 leading causes of death in the US are, or are strongly associated with, preventable and treatable chronic diseases.
Many chronic diseases are at least partly attributable to individual health behaviors, such as excessive drinking, smoking, sedentary lifestyles, and poor nutrition.
Our choices matter, a lot.
It’s estimated that at least 80% of cardiovascular disease cases, 40% of cancer cases, and 45% of Alzheimer’s cases are preventable. These diseases can each take 20 years or more to develop.
In other words, our lifestyle, our daily choices, really matter.
According to leading scientists in the field of life extension, genetics are credited with just somewhere between 5% and 25% in how you age. Which means 75% to 95% of your health span is determined by your life choices and, perhaps, a bit of luck.