The Surprising Science Behind Living to 100
The latest 2024 Revision of World Population Prospects reveals a striking trend: the number of centenarians—people who live to 100 and beyond—has roughly doubled every decade since 1950. Even more astonishing, experts predict this number will quintuple between 2022 and 2050.
Longevity isn’t just about luck or genetics. Lifestyle, environment, social relationships, and a mix of still-mysterious factors all play a role. Understanding what helps these exceptional individuals thrive could offer a roadmap for extending both lifespan and healthspan.
A Groundbreaking Swedish Study
Researchers in Sweden tracked 44,637 people born between 1893 and 1920, all from Stockholm County. Routine blood tests taken in midlife (ages 64–99) between 1985 and 1996 were analyzed, and participants were followed for up to 35 years.
Of the total, 1,224 reached 100, with 85% women, highlighting the well-known longevity advantage for females. But the study went beyond counting birthdays—they wanted to see if midlife biomarkers could predict who might live a century.
Blood Markers That Predict Longevity
Twelve key blood markers were analyzed, including:
- Glucose – metabolic health
- Creatinine – kidney function
- Uric acid – inflammation indicator
- Albumin – nutrition and protein status
- Cholesterol & iron – balance matters more than extremes
- Liver enzymes – GGT, ALP, LD
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