 He concluded that Western methods of commercially preparing and storing foods stripped away vitamins and minerals necessary to prevent these diseases.The 1939 foreword to the book, written by physical anthropologist Earnest A. Hooton, lauded Price's work for confirming previous research that dental caries were less prevalent in "savages" and attempting to establish the etiology for this difference.In 1940, a review in the "Canadian Medical Association Journal" called the book "a masterpiece of research", comparing Price's impact on nutrition to that of Ivan Pavlov in digestion.