This might have to do with increasing BMI, though the direction of the causal relationship could go either, or both ways. I wonder if I can dig up a plot of ave

This might have to do with increasing BMI, though the direction of the causal relationship could go either, or both ways. I wonder if I can dig up a plot of average fat composition over a similar period of time. I don't know how recently we started getting fatter but I suspect it started slowly with the industrial revolution.