The Role of Nutrition in our Health Practice Test

The main idea is how GI and GL describe the impact of carbohydrate foods on blood sugar after a meal. Glycemic index ranks carbohydrate-containing foods by how quickly they raise blood glucose levels after a standard amount of carbohydrate is consumed. Glycemic load refines that by taking into account how much carbohydrate is eaten, calculated as GL = (GI × grams of carbohydrate per serving) / 100. Because these measures combine both the speed of glucose rise and the amount of carbohydrate, they influence postprandial glucose and insulin responses, and foods with lower GI and lower GL tend to produce steadier glucose levels with smaller insulin spikes. Statements that mischaracterize what GI and GL measure—such as claiming GI is about taste, GL about fiber, or that GI applies to fats and GL to proteins—are not accurate, and GL is indeed related to postprandial glucose.