Weight gain

NPR -  Duke University professor Herman Pontzer and an international team of collaborators compared the daily total calorie burn of individuals from 34 countries and cultures worldwide. The participants varied in lifestyles, showing strong evidence that diet and not a lack of physical activity is currently a key factor in weight gain and obesity. The study found that people in countries that derive a larger portion of their calories from ultra-processed foods tend to have more obesity and higher body fat percentages. Here’s what else experts say about trying to outrun a bad diet.