A recent investigation has offered insight into the potential for extending one’s lifespan by up to five years, even for those with a genetic inclination towards shorter longevity, through the adoption of a healthy lifestyle. This revolutionary research, carried out by scientists from Zhejiang University School of Medicine in China and the University of Edinburgh, tracked 353,742 individuals from the UK Biobank over an average period of 13 years, during which 24,239 deaths occurred.
The study, recently published in the esteemed journal BMJ Evidence-Based Medicine, uncovered that individuals with a high genetic risk of premature mortality faced a 21% heightened probability of succumbing to early death, regardless of their lifestyle choices. Conversely, those leading unhealthy lifestyles experienced a significant 78% increase in the likelihood of premature death, irrespective of their genetic predisposition. Moreover, individuals who combined an unhealthy lifestyle with a genetic profile indicating a shorter lifespan more than doubled their chances of early death compared to those with beneficial genes and healthy habits.
Nevertheless, the researchers emphasized that individuals appeared to have a level of influence over the outcome. In fact, it was determined that approximately 62% of the genetic risk of a shorter lifespan or early death could be mitigated by adopting a healthy lifestyle.
Consequently, the team of specialists concluded that “participants with high genetic risk could prolong approximately 5.22 years of life expectancy at age 40 with a favourable lifestyle.” Furthermore, they identified the “optimal lifestyle combination” for an extended lifespan as “never smoking, regular physical activity, adequate sleep duration, and a healthy diet.”
The study also categorized individuals into three genetically determined lifespan categories: long (20.1%), intermediate (60.1%), and short (19.8%). Participants were further evaluated based on three lifestyle score categories including favourable (23.1%), intermediate (55.6%), and unfavourable (21.3%).
Significantly, the researchers employed polygenic risk scores to assess various genetic variants that contribute to an individual’s overall genetic propensity to a longer or shorter life. Additionally, lifestyle factors such as smoking, alcohol consumption, exercise, body shape, diet, and sleep were also taken into consideration.
In conclusion, this study serves as a valuable reminder that the decisions we make in our daily lives can considerably impact our overall wellbeing and life expectancy, irrespective of our genetic composition. It exemplifies the influence of embracing a healthy lifestyle in shaping our future.