Often you’ll hear you should ‘eat a healthy diet’. But what is a healthy diet? Simply recommending real, unprocessed food is great, but carnivore and vegan diets can qualify as whole food diet and yet some real food diets can be nutrient poor and toxin rich. Most people have some vague ideas as to what a healthy diet is, which probably doesn’t come from synthesizing research studies. That’s where Paul and Shou-Ching Jaminet come in with the thoroughly researched PHD. PHD is divided into five sections: