"Gem GI" is a clear introduction to what a GI diet is and how it works. It explains the difference between the glycemic index of a food and its glycemic load. The GI food counter rates hundreds of foods using a simple traffic-light system--red for foods to avoid, amber for foods to eat occasionally, and green for foods to focus on. Contains a clear introduction to GI diets and how they work. Cuts through the jargon associated with technical sounding terms such as glycemic index and loads. The food rater operates as in the "Gem Calorie" and "Carb" counters giving the GI rating as well as calories and carbs for hundreds of different foods. Provides tips and advice on how to use GI dieting most effectively and helps you maintain a healthy eating regime. There is also a useful guide to what to choose when eating at your favorite Chinese, Italian, and Mexican restaurants, and more.