Researchers analyzing more than 350,000 adults found lifestyle choices can outweigh inherited risk for early death, extending lifespan by up to five years even among those genetically predisposed to shorter lives.
By yourNEWS Media Newsroom
Healthy lifestyle choices can substantially blunt the impact of so-called “bad genes,” reducing the risk of premature death by more than 60 percent and extending life expectancy by as much as five and a half years, according to a large new population study.
The research, published in BMJ Evidence-Based Medicine, analyzed health and genetic data from more than 350,000 adults enrolled in the UK Biobank and followed participants from 2006 through 2021. Investigators examined how genetic predisposition to longevity interacted with everyday behaviors such as diet, exercise, smoking, and sleep.
Researchers grouped participants using polygenic risk scores, which estimate genetic tendencies toward longer or shorter lifespan. About 20 percent of participants carried genes associated with shorter lives, 60 percent fell into an intermediate range, and 20 percent had genes linked to longer longevity.
Despite these differences, lifestyle emerged as the dominant factor. Participants with unhealthy habits—including smoking, physical inactivity, poor diet, excessive alcohol use, and inadequate sleep—faced a 78 percent higher risk of early death, regardless of whether their genes favored longevity. By contrast, individuals who followed healthy routines cut their mortality risk by 62 percent, even when they carried a high genetic risk.
The findings showed that people with “unfavorable” genes but healthy lifestyles lived longer than those with “favorable” genes who engaged in poor health behaviors. Researchers estimated that adopting healthy habits could add up to 5.5 years of life expectancy for individuals otherwise genetically predisposed to shorter lifespans.
The study identified four core behaviors most strongly linked to longevity: avoiding tobacco, engaging in regular physical activity, maintaining adequate sleep, and consuming a nutrient-rich diet. Participants who adhered to these pillars consistently saw the greatest reductions in mortality risk.
Researchers said the results support the growing field of epigenetics, which examines how behavior and environment influence gene expression. While DNA itself does not change, lifestyle factors can modify how genes are activated or suppressed, suggesting inherited risks are not fixed outcomes.
The authors cautioned that the research was observational and cannot prove direct causation. They also noted that the study population was predominantly of European descent, limiting how broadly the results can be applied to other groups. In addition, lifestyle factors were measured at a single point in time, even though habits can evolve.
Still, the scale of the data and consistency of the findings led researchers to urge a shift in public health priorities. They argued that preventive strategies—such as improving nutrition, increasing physical activity, and reducing smoking—may have a greater impact on population health and longevity than medical interventions aimed solely at managing disease after it develops.
The findings challenge the notion that genetics dictate destiny and suggest that small, sustained lifestyle changes can meaningfully alter long-term health outcomes. As chronic illnesses continue to rise globally, the study reinforces a central conclusion: daily choices play a decisive role in determining how long—and how well—people live.
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Source: Natural News
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