[Photo/SIPA]

3. More protein and fruits, and less greasy foods

Modern research finds that sleepiness in spring is usually accompanied by insufficient protein, vitamins and an imbalance of internal acid. To feel light and alert, eat more food that is high in protein, such as salmon and eggs; rich in vitamins, such as citrus and lemon and alkaline foods, such as fresh vegetables. Greasy foods and alcohol will have the reverse effect.