Precision Nutrition: Allergies and Intolerances What is the difference between a food allergy and intolerance? Dr. John Berardi, PhD, CSCS of Precision Nutrition explains how you can identify your food intolerances. Watch other Nutrition videos here:Part 1: Essential FatsPart 2: Proteins To learn more about nutrition, sign up for a free course here: http://www.precisionnutrition.com/cmd.php?Clk=5198303