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Who said 70 is the new 50? Investigating the phrase's origin

In April 2025, the International Monetary Fund (IMF) drew significant attention with a report highlighting improved longevity and health, leading multiple news outlets to frame the report's findings with the declaration that "**70 is the new 50**". While no single individual coined the phrase, the IMF's data, showing that a 70-year-old in 2022 had comparable cognitive and physical function to a 53-year-old in 2000, provided a powerful, data-backed foundation for this widely circulated sentiment.