Online discussions about food and health have recently focused on a method of cooking, chilling, and reheating rice, pasta, and potatoes. The topic has gained attention over the past few years on social media and nutrition websites, mainly in North America and Europe, due to claims about weight control and blood sugar management. The idea is based on a scientific process called retrogradation, which happens when cooked starch cools. Starch is a common energy source, but when it is cooked, it is digested quickly and can raise blood sugar levels. Because of this, researchers have studied how cooling affects digestion, especially for people concerned about diabetes and obesity.

Retrogradation changes part of the starch into resistant starch, which is more difficult for the body to digest. Studies published in nutrition journals reported that this can slow digestion and reduce sharp increases in blood sugar after meals. Experts noted that the calorie content does not change in a significant way, but the body absorbs the energy more slowly. Recent research has used tools such as glucose monitoring technology to measure these effects more clearly. However, the results vary depending on the type of food and eating habits. Researchers emphasize that chilled carbohydrates may support healthier eating only when combined with balanced meals and long-term lifestyle changes.