GI/GL is not directly related to the carbohydrate number on nutrition fact table. The number must be tested in a controlled environment. E.g. regular coke has

GI/GL is not directly related to the carbohydrate number on nutrition fact table. The number must be tested in a controlled environment. E.g. regular coke has a GI of 63 (source http://www.health.harvard.edu/diseases-and-conditions/glycemic-index-and-glycemic-load-for-100-foods http://www.health.harvard.edu/diseases-and-conditions/glycem...), and is considered medium GI, but of course it contains a lot of sugar.