1. dark chocolate: dark chocolate is rich in cocoa, which can promote the brain to produce "happy" neurotransmitters. Eating a small piece of dark chocolate can produce a pleasant effect.

2. Banana: Banana is rich in vitamins and minerals, which can improve the level of active compounds in the brain, help to reduce stress and improve mood.

3. Walnuts: Walnuts contain essential fatty acids, which can improve the level of "happy compounds" in the brain, help improve mood and relieve depressive symptoms.

4. Blueberries: Blueberries are rich in antioxidants, which can increase brain blood flow, stimulate the secretion of "happy" hormones, and help relieve depression and anxiety.

5. Strawberry: Strawberry is also rich in vitamins and antioxidants, which helps to enhance memory and emotional stability.

6. Chicken: Chicken is rich in tryptophan, which can improve the level of "happy" neurotransmitters in the brain, help improve mood and reduce stress.

7. Pepper: Capsaicin in pepper can improve the brain's sensitivity to endorphins, stimulate the release of endorphins, and produce a relaxing effect similar to dizziness or exercise.

8. Corn: Corn is rich in vitamin E and misunderstood acid, which helps to relieve symptoms of depression and anxiety and improve mood.

Besides food, adequate sleep, moderate exercise, breathing fresh air and pleasant music can also improve mood by improving the secretion of "happy substances" in the brain. A healthy lifestyle can make us live a happier and more active life.