What Happens to Your Body When You Eat Pancakes

3. You may feel like you need a nap.

The thing about sugar is that, while it will initially give you a surge of energy, a crash will shortly follow. That's because consuming all of that sugar will cause your blood sugar levels to abruptly spike, which inevitably leads to a dramatic fall. It largely has to do with the glycemic index of certain foods. For example, sucrose has a high glycemic index as does white flour. This crash may cause you to feel sluggish like you need to lie down and take a little nap.