Human Lifespan: Average Life Expectancy and Key Influencing Factors
Average human life expectancy is ~79 years (WHO), with significant variation (some >100, others die young). Key factors:
- Genetics: Longevity-linked genes (growth hormone, insulin regulation).
- Lifestyle: Smoking, alcohol, unhealthy diet shorten life; exercise, healthy diet, sleep extend it.
- Environment: Pollution, healthcare access affect longevity.
Despite these, individual lifespan remains unpredictable; no guarantees exist.
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