Healthy snacks curb cravings and hunger, keep blood sugar levels in check, and fuel your body with nutrients. They also promote weight loss and boost your metabolism. Blood sugar levels dip three to five hours after eating, which leads to fatigue, tiredness, and low energy. A snack can revitalize your body, enhance mental focus, and boost your energy. The key is to choose healthy snacks that are low in sugar and high in protein and essential fats, such as trail mixes, nuts, seeds, tuna, cottage cheese, or whole grain pretzels. Avoid sugary snacks because they give you a quick boost of energy followed by a sharp low.