Which type of carbohydrate is digested quickly and causes rapid spikes in blood sugar?

Simple carbohydrates are the type of carbohydrate that is digested quickly and can lead to rapid spikes in blood sugar levels. They consist of basic sugars or short chains of sugar molecules, which the body can break down and absorb into the bloodstream swiftly. This rapid digestion and absorption can cause a quick increase in blood glucose, which may lead to an immediate burst of energy, but can also result in a subsequent drop in energy levels, often referred to as a "sugar crash."

While complex carbohydrates, such as whole grains and legumes, contain longer chains of sugar molecules, they take more time for the body to break down. This slower digestion helps to provide a more gradual and sustained release of energy. Fiber-rich carbohydrates, predominantly found in fruits, vegetables, and whole grains, are not readily digested, contributing to digestive health and helping to regulate blood sugar levels. Starch-based carbohydrates, found in foods like bread and potatoes, can vary in their effect on blood sugar depending on their processing and fiber content. Therefore, while different types of carbohydrates can impact blood sugar differently, simple carbohydrates are particularly known for their rapid effect.