When internationally known nutrition researcher Olga Raz conducted an experiment to find out how eating various meals effects serotonin levels in the human brain, she made a surprising discovery destined to revolutionize the way people eat to lose weight. It came as no surprise that serotonin, a brain chemical that controls the human hunger switch, rises after eating a meal high in carbohydrates. What did surprise Raz and her colleagues was the significant drop in serotonin after eating a high-protein meal. Low serotonin levels cause unwelcome biological responses - hunger, cravings, irritability and low moods are among the most notable and the reason why high protein diets are so short-lived. What, she wondered, would happen if people ate a diet counter to the current diet craze? Now, thousands of success stories later, Olga Raz's Bread for Life Diet will revolutionize the way we eat to lose weight and maintain it.