The glycemic index ranks the impact a single food has on your blood glucose and insulin levels. Only carbohydrates are ranked on the glycemic index; protein-based foods do not raise blood glucose levels. The glycemic index is a scale from zero to 100, with white table sugar or white bread ranking at 100. Opting for foods lower on the glycemic index or combining foods to reduce their glycemic index can reduce variations in blood sugar.
Foods and Their Rankings
The glycemic index is a guideline that can help you make smart food choices. Fat and fiber lower glycemic index or GI rankings. Whole grains are lower on the glycemic index than refined ones, in most cases. Natural fructose-based sugars such as honey and agave nectar are lower than white or brown sugar. Whole fruit is a better option than fruit juice. Foods with a GI rating over 70 are considered high-GI foods, while those ranked between 55 and 70 are medium and foods with a GI ranking lower than 55 are low.
The Impact of the Glycemic Index
Foods lower on the glycemic index have a reduced impact on blood glucose and blood insulin levels. Foods and beverages with high GI rankings are digested quickly, causing your blood glucose levels to spike rapidly. Lower-GI foods are digested more slowly and may reduce hunger. Controlled blood sugar can reduce your risk of insulin resistance.
The Glycemic Index and Weight Loss
Glycemic index diets offer an alternative to calorie-counting or low-carbohydrate diet plans. Low-GI diets encourage generous portions of high-fiber fruits and vegetables, avoidance of high-glycemic index foods like white rice, white potatoes and white bread, and moderate consumption of low-GI carbohydrates like whole-grain breads and cereals. While low-glycemic index diets are a reasonable choice for weight loss and can be effective, they may not be a better choice than any other moderate, balanced diet plan.
Risks and Drawbacks
While the GI index is a useful tool, you do need to combine it with basic nutritional knowledge and common sense. Choose healthier foods and a variety of foods rather than selecting foods purely based on their ranking. Portion control is essential for weight loss or maintenance or for the management of a chronic condition like diabetes.
