Although I like the majority of this article, I have a small quibble in Murray's recommendation to eliminate butter. If one can obtain butter from organically raised, grass-fed cows, butter is an excellent source of vitamins A and D, butyric acid (antimicrobial and feeds flora in the gut), some medium-chain fatty acids (used by the liver for immediate energy production), and even a bit of highly unsaturated fats, which the body uses to make prostaglandins, localized tissue hormones that direct many processes in the cells. In addition, the healthy saturated fats in good butter help maintain the integrity of cell membranes.