nutrient density.  if you have the choice between spinach and potatoes, spinach has more other nutrients per calorie.<p><a href="http:&#x2F;&#x2F;www.peertrainer.com&#x2F;gfx&#x2F;en_us&#x2F;nut_density.jpg" rel="nofollow">http:&#x2F;&#x2F;www.peertrainer.com&#x2F;gfx&#x2F;en_us&#x2F;nut_density.jpg</a> is an example chart i found after 10sec of googling<p>you might say potato is higher than chicken.  but im not going to turn potato into muscle, i will turn chicken into muscle.<p>at the end of the day, fat and protein are necessary to survive, starch is optional.