Gem GI is a clear introduction to what a GI diet is & how it works. It explains the difference between the glycemic index of a food & 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 & green for foods to focus on. Contains a clear introduction to GI diets & how they work. Cuts through the jargon associated with technical sounding terms such as glycemic index & loads. The food rater operates as in the Gem Calorie & Carb counters giving the GI rating as well as calories & carbs for hundreds of different foods. Provides tips & advice on how to use GI dieting most effectively & helps you maintain a healthy eating regime. There is also a useful guide to what to choose when eating at your favourite Chinese Italian Mexican etc restaurants.