The pitfalls of overindulgence in certain food elements, especially oil and sugar, have been well documented. Dr. Walker offers in his book DIET & SALAD both a cook book and a nutritional guide that belongs in every homemaker's kitchen. In it he supports current medical research about the harmful effects of milk - “It is generally assumed that cow's milk is one of our most perfect foods... Milk is the most mucus forming food in the human dietary, and it is the most insidious cause of colds, flu, bronchial troubles, asthma, hay fever, pneumonia, and sinus trouble ... cow's milk was never intended for a human infant.”