
21. Mussels
Mussels are a great source of protein, healthy fats, and vitamin B12. You can get an impressive 340% of your daily recommended amount of B12 in a 3-ounce serving. B12 plays a big role in mood because when you are deficient, it causes symptoms like fuzzy thoughts and low mood.

Mussels also contain selenium and iodide, both essential nutrients for healthy thyroid function. The thyroid is critical in the production of mood-balancing hormones. Furthermore, mussels are full of Omega-3 fatty acids that have brain-boosting and protecting benefits. The manganese in mussels also helps fight free radicals in the brain.