20 Foods That Can Actually Bring You Happiness

6. Mussels

Mussels are loaded with some of the highest naturally-occurring levels of vitamin B12, a vitamin countless adults are missing out on. Vitamin B12 helps insulate your brain cells, keeping your brain sharp as you age. Mussels also contain the trace nutrients zinc, iodine, and selenium, which keep your thyroid—a major mood regulator—on track. Another benefit? Mussels are high in protein and low in fat and calories, making them one of the healthiest, most nutrient-dense foods that make you happy out there.