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Genetic predispositions for obesity may be amplified by modern environmental factors, leading to greater weight gain in individuals today compared to those with similar genetic traits born before the current obesity epidemic. A new study published in PLOS Genetics explored this phenomenon.

The research suggests that while genetic variations linked to obesity have always existed, their impact on weight gain might be more pronounced in today's environment, characterized by widespread availability of calorie-dense foods and sedentary lifestyles. Individuals carrying these genetic variations may be more susceptible to gaining excess weight under these conditions.

This finding highlights the complex interplay between genetics and environment in the development of obesity. It implies that the 'obesity epidemic' is not solely driven by genetic factors but is significantly influenced by the surrounding conditions, which can exacerbate the effects of genetic predispositions.