Dietary habits significantly affect energy levels throughout the day. Consuming a balanced diet rich in complex carbohydrates, proteins, and healthy fats can provide sustained energy. Foods like whole grains, fruits, and vegetables release energy slowly, preventing spikes and crashes. On the other hand, diets high in sugar or refined carbs can lead to quick energy surges followed by fatigue. Staying hydrated also plays a critical role in maintaining optimal energy levels, as even mild dehydration can result in fatigue and decreased concentration.