The glycemic index is a scale that ranks foods according to how much they raise blood glucose levels. Usually, the scale is a comparison to another food, such as pure glucose.  Carbohydrates are ranked according to the way that they affect an individual’s blood glucose levels. The higher a food's glycemic index, the more it affects blood sugar and insulin levels. When the carbohydrates in a food cause a person’s blood sugar to spike, it is considered a high-glycemic food. Low-glycemic foods do not have a significant effect on blood sugar, and foods that fall somewhere in the middle are considered moderate-glycemic foods.  GI is actually measured by feeding the food to 10 healthy adults (who had fasted) and checking their blood sugar periodically. The GI is based on the averages. This scale is primarily meant to help people with diseases like diabetes. Utilizing the glycemic index is very helpful for women suffering from Polycystic Ovarian Syndrome too, as these women typically have insulin resistance. This causes the woman's body to resist the effects of insulin, causing prolonged blood sugar spikes and eventually diabetes. Following a low-glycemic index diet can significantly lower blood sugar spikes in these individuals. It is also helpful for people who want to lower their carbohydrate intake or who want to lose weight. Because low-glycemic foods are absorbed more slowly, they help you feel fuller for longer. Therefore, they help control your appetite. Many factors can affect a food's GI. For instance, processing can increase a food's GI, such as a grape, which has a lower GI, compared to grape juice, which has a higher GI. Other factors that can affect the GI are how long you cook the food (pasta that is cooked longer has a higher GI), the type (some types of rice have a higher GI than others), and how ripe a piece of fruit is. GI numbers are only assigned to foods that have carbohydrates in them.Therefore, foods such as oil or meat do not have a GI number. Generally, foods that are rated 55 or less are...

How would you rephrase that briefly using Vietnamese?
Hiểu chỉ số Glycemic (GI) là gì. Hiểu rõ đối tượng tiếp nhận lợi ích từ chỉ số Glycemic. Ăn thực phẩm chỉ số GI thấp để cảm thấy no. Hiểu rõ yếu tố ảnh hưởng đến chỉ số Glycemic (GI). Hiểu rõ nên áp dụng chỉ số Glycemic cho những thực phẩm nào. Hiểu rõ thế nào là thực phẩm có chỉ số GI thấp.