Digestion speed is measured by something called the glycemic index. High-glycemic carbs are the ones that digest quickly and low-glycemic carbs digest a bit more slowly.
High-glycemic carbs come from foods like fruit, rice, candy, soda, juice, and any other “sugary” carb. They digest quickly and give you a quick hit of energy. Low-glycemic carbs come from whole grains, vegetables, and any carbohydrate that’s a bit slow to digest. These typically take longer to break down, so you’ll feel full longer and have a steady, slow release of energy.