Guest guest Posted February 3, 2006 Report Share Posted February 3, 2006 INFORMATION FROM WEBSITE BELOW [the UK spells glycemic with an " a " included] The glycaemic load (GL) of a specific food portion is an expression of how much impact ( " oomph " ), or power the food will have in affecting blood glucose levels. It is calculated by taking the percentage of the food's carbohydrate content per portion and multiplying it by its Glycaemic Index value GL= CHO content per portion x GI 100 It is thus a measure that incorporates both the quantity and quality of the dietary carbohydrates consumed. Some fruits and vegetables, for example, have higher GI values and might be perceived as " bad " . Considering the quantity of carbohydrate per portion, however, the GL is low. This means that their effect on blood glucose levels would be minimal. Let us consider a few examples: * The GI of watermelon is high (GI = 72), but its glycaemic load is relatively low (GL = 7), because the quantity of carbohydrate in a serving of watermelon (150 g or a 5 mm thick slice) is minimal, as it contains a lot of water. This does not hold true for watermelon juice, however, as the quantity of carbohydrate in a cup of watermelon juice (250 ml) is much higher and fruit juice is therefore a more concentrated source of carbohydrate. * The GI of apples is 38 and the GL of one medium apple is 5. This means that eating one apple will have hardly any effect on blood glucose levels. If you eat an entire 500 g packet of dried apples, however, its GL would be 50, which means that it will have a huge effect on your blood glucose levels, despite its being low GI. This brings us back to the old principle that there is no license to overindulge in " good " or " bad " foods. But should you indulge in watermelon, it will have an even greater effect on blood glucose levels, due to its high GI value! And lastly, a high GI food with a low GL will not necessarily affect blood glucose levels significantly. A good example here is the high GI vegetables (carrots, pumpkin, etc). They contain only a little carbohydrate and therefore, in normal portion sizes, will not impact on blood glucose levels even though they have a high GI, as there is not enough " power " behind the high GI. The proviso is, though, that they are not eaten with other high GI or GL foods. For full article- http://www.gifoundation.com/glycemic_load_concept.htm Quote Link to comment Share on other sites More sharing options...
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