I was expecting confounding factors not being considered. > The researchers found that the consumption of energy from carbohydrate crops (grains and tubers) do

I was expecting confounding factors not being considered. > The researchers found that the consumption of energy from carbohydrate crops (grains and tubers) does not lead to greater life expectancy, and that total meat consumption correlates to greater life expectancy, independent of the competing effects of total calorie intake, economic affluence, urban advantages, and obesity. But what I see here is carbs vs protein. It doesn't say what substituting other proteins for meat does to life expectancy.