Carbs are an important part of your diet as your body sources energy from these nutrients. Nearly all meat sources, vegetables, or even dairy have carbs in them. However, some sources of carbs work “fast” while some work “slow” in supplying energy. Also, depending on the speed of carbs, they may be good or bad for weight loss goals. That said, the glycemic index of carbs determines the rate at which they are digested. Slow carbs, as the name implies, release energy slowly into the body. The fast carbs, on the other hand, release energy at a higher pace as they are used more quickly. So, the higher the GI level of carb, the quicker is its delivery of sugar and energy in the body, and vice versa.