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Glycemic Index
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The Glycemic Index (GI) is the measure of the amount and the rate of an increase in blood sugar after eating a carbohydrate. The higher the GI, the larger the rise in blood sugar, and the more insulin is released. Unfortunately the more insulin in your system, the more fat you'll retain. Eating 40-30-30 reduces your glycemic load.
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The Glycemic Index, GI, is a scale that ranks carbohydrate-rich foods in order of how they affect body's blood sugar levels( glucose) compared to glucose or white bread. The GI of glucose is 100.
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A healthy eating plan that enables you to maintain a low to moderate Glycemic Index has great potential importance in treating and preventing chronic disease. In studies in which persons with type 2 diabetes were given a low GI diet, their risk predictors of heart disease such as total cholesterol and "bad" LDL cholesterol fell. In other short-term human studies, individuals with a high intake of high GI carbohydrates had more insulin resistance than those who ate diets based upon low GI carbohydrates.
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In order to test the Glycemic Index of a food people have to have their blood sugar levels tested at pre-determined intervals after eating foods containing carbohydrates. The GI of over 600 foods has been determined worldwide and more foods are being tested on a weekly basis , overseas as well as in South Africa.
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The above Glycemic Index table shows a single value of GI for each food. In reality, though, the measurements are not so precise. Reported values are generally averages of several tests. There's nothing wrong with that methodology, but individual measurements can vary a significant amount. For example, baked Russet potatoes have been tested with a GI as low as 56 and as high as 111! The GI for the same fruit has even been shown to increase as the fruit ripens.
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The Glycemic Index ranks carbohydrate foods according to their effect on the body’s blood glucose levels. Individual foods are compared to white bread or glucose and ranked on a 100-point scale, with white bread at 100. A GI of 70 or more is high; 56 to 69 is medium; 55 or less is low. At the high end of the scale are crackers and corn fl akes; at the low end are non-starchy vegetables, fruits, beans, sugars and most dairy products. Glycemic values may differ from person to person and can be affected by factors such as ripeness, cooking procedures, processing techniques and food combinat.
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Glycemic Index