A study of older adults in five Spanish cities suggests a link between air pollution and changes in body composition. Researchers found that higher exposure to pollutants, particularly black carbon from diesel engines, correlates with increased body fat and a decrease in lean muscle mass. The research specifically highlights an increase in visceral fat for participants under 65. While the study does not prove direct causation, the findings suggest that urban air quality may influence metabolic health independently of diet and exercise habits.
