A new cross sectional study just dropped demonstrating that the amount of meat one consumes is correspondent to life expectancy.
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Unless you are forcing people to go on specific diets only shows correlation and not cause and effect
Areas who could afford more meat could afford other things that improved health
More meat consumption should improve health in cultures where people are physically active and have food shortage
More meat fat consumption should not improve health in sedentary food abundant cultures
Exception
SE Asia where after a certain point the life expectancy lowered with more meat consumption
