How much protein should we eat and why?

As doctors, we are rarely taught this. We learn about body composition, metabolism, physiology, anatomy etc. But how much, when and why is sometimes more of the mystery. Or maybe I have forgotten all this.

Luc van Loon is a professor of exercise physiology and nutrition in the Netherlands and he has done amazing research in this field.  Most of the data written in this blog is from his research.