But these findings are not definitive, and they vary across studies and populations.
What research actually shows about living to 100
When scientists study centenarians—people who live to 100 or older—they consistently find that no single trait explains extreme longevity.
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Instead, centenarians tend to share a combination of factors:
Lower rates of chronic disease
Healthy cardiovascular systems
Strong genetic resilience
Active lifestyles
Balanced diets
Social connection and mental engagement
Some studies have looked at whether certain blood types appear more frequently among centenarians, but results are inconsistent and often influenced by small sample sizes.
