Association of Planetary Health Diet with Decreased Risk of All-cause Mortality and Environmental Benefits: Insights from a Multi-national Prospective Cohort Study.

= 0.1877 and 0.5456, respectively), and body mass index mediated 11.88% of the relationship. A higher PHDI was associated with lower greenhouse gas emissions but higher freshwater use. Our findings suggest that greater compliance with the PHD reduces mortality risk; however, its benefits for environmental sustainability are less certain.