My own anecdotal experiences support it. Back when I was running seriously (i.e. 80-200km/week), I regularly got triple burger combo meals with huge fries at fast food places, drank soda like water, ate candy during my long runs and occasionally even dipped pizza in mayo or melted butter when I felt like it. Bacon was life.

I had a BMI a 21, a resting pulse of 47, incredibly good lipid levels and lower than average blood sugar.