Vitamin B12 is found naturally in a wide variety of animal foods. Plant foods have no vitamin B12 unless they are fortified. You can get the recommended amounts of vitamin B12 by eating a variety of the foods including: 1  Organ meats (beef liver). 2  Shellfish (clams). 3  Meat, poultry, eggs,milk and other dairy foods.
Eating a variety of healthy foods is one way to help you smile when you step on the scale, and modifying your diet to include more mood-enhancing foods can also help you maintain that cheery disposition. A healthy diet isn't a cure for clinical depression or mood disorders, however.
While there is no single ingredient that is sure to boost your mood or keep you sharp well into your old age, the correlation between mental well-being and a diet that is rich in fruits, vegetables, lean protein, and olive oil gets stronger every year.