What does the Glycemic Index (GI) measure?

The Glycemic Index (GI) specifically measures how different carbohydrate-containing foods affect blood sugar levels when consumed. It provides a numerical value to foods indicating how quickly their carbohydrates are converted into glucose and subsequently enter the bloodstream. Foods with a high GI are absorbed rapidly, resulting in a quick spike in blood sugar levels, while those with a low GI are absorbed more slowly, leading to a gradual increase in blood sugar.

Understanding the GI is crucial for managing blood sugar levels, particularly for individuals with diabetes or those looking to maintain steady energy levels throughout the day. Foods with a lower GI are often recommended for a healthy diet because they help manage hunger and can lead to better overall health outcomes. This concept is integral to nutrition science as it affects dietary planning and can influence metabolic responses.