Book excerpt: In this program, nutrition and fitness expert JJ Virgin reveals the real secret behind weight gain -- food intolerance. A negative reaction to certain foods like dairy or gluten can sabotage your health by triggering inflammation and causing a host of nasty symptoms like bloating, breakouts, headaches, achy joints and--worst of all--stubborn weight gain. On The Zero Tolerance Diet, you'll eat plenty of anti-inflammatory, healing foods to reclaim your health and reset your metabolism, while avoiding the 7 foods that are most likely to cause food intolerance. You'll never feel hungry or deprived, and in just one week, you'll drop up to 7 pounds, lose belly bloat, gain energy, clear up inflammation and look and feel years younger.