The difference between complex and simple carbohydrates lies in their chemical structure and how the body processes them. Simple carbohydrates consist of one or two sugar molecules and are quickly absorbed, leading to rapid spikes in blood sugar. Examples include fruits and sucrose (table sugar). In contrast, complex carbohydrates are made up of longer chains of sugar molecules, taking more time to digest. They provide a steadier release of energy, which helps maintain blood sugar levels. Sources of complex carbs include whole grains, legumes, and vegetables. Overall, choosing complex carbs supports sustained energy and better health.