Life Expectancy Growth Slows Down, Experts Emphasize Importance of Healthy Years

Strategic Insights -

As life expectancy nearly doubled over the last century due to factors such as healthier diets and medical advances, experts now believe that the focus should shift from extending lifespan to improving the quality of life at older ages. The rate of increase in life expectancy has slowed considerably in the last three decades, and scientists suggest that there may be more immediate potential in improving quality of life at older ages instead of extending life.

Key Takeaways:

  • The rate of increase in life expectancy has slowed considerably in the last three decades, after nearly doubling over the course of the last hundred years.
  • Experts now believe that the focus should shift from extending lifespan to improving the quality of life at older ages, as "most people alive today at older ages are living on time that was manufactured by medicine."
  • The study suggests that it would be optimistic if 15% of females and 5% of males could live to 100 years old in most countries this century, indicating that radical human life extension is implausible in this century.
  • The rate of increase in life expectancy has slowed across the globe, with notable declines in the United States, Japan, and Hong Kong.
  • The study found that despite breakthroughs in medicine and public health, life expectancy for those in the world's longest-living populations has only increased by an average of six and a half years since 1990.
  • Researchers emphasize that extending life expectancy even further could be harmful if those additional years aren't healthy years, and instead suggest focusing on efforts that slow ageing and extend healthspan.
  • Prof. S Jay Olshansky states that the conventional wisdom that a life expectancy beyond 100 years is achievable is incorrect, and that modern medicine is yielding incrementally smaller improvements in longevity.

Statistics:

  • 19th and 20th centuries: dramatic increases in how long people are expected to live due to healthier diets and medical advances.
  • 1990-2019: life expectancy increased by an average of six and a half years for those in the world's longest-living populations.
  • 2023: 15% of females and 5% of males may live to 100 years old in most countries, according to optimistic projections.
  • 30-60 year range: the natural longevity endowment for the human species, according to Prof. S Jay Olshansky.

Sources:

  • Nature Ageing, "Three regions in the world's longest-living population did not experience a statistically significant slowdown in life expectancy growth" (no date available)
  • Nina Massey, "The rise in human life expectancy may be finally slowing down after nearly doubling over the last century" (no date available)