It's possible. While it's too soon to say, "an apple a day keeps the doldrums (feeling low & depressed) away," Researchers are studying the links between what we eat and how we feel. There is evidence that changing your diet can alter your metabolism and brain chemistry, ultimately affecting your energy level and mood.
Foods can boost energy in three ways: by providing sufficient calories, by delivering stimulants like caffeine, and by increasing the metabolism to burn fuel more efficiently. As for mood, the best foods are those that stabilize blood sugar and trigger feel-good brain chemicals, such as serotonin.
Cashews, Almonds, and Hazelnuts
These nuts are rich in protein and magnesium, a mineral that plays a key role in converting sugar into energy. Being low on magnesium can drain your energy. Good sources of magnesium include whole grains, particularly bran cereals, and some fish, including halibut.
Add Brazil nuts to the mix for selenium, a mineral that may be a natural mood booster. Studies have linked low selenium to poorer moods. Smaller amounts of selenium are also found in meats, seafood, beans, and whole grains. Don't overdo it: Too much selenium is harmful. A new study shows that taking too much selenium could adversely affect the heart by raising LDL (Bad) cholesterol levels. Other studies have shown that high levels of selenium increase the risk of type 2 Diabetes and open angle glaucoma.
Lean pork, lean beef, skinless chicken, and turkey are sources of protein that include the amino acid tyrosine. Tyrosine boosts levels of two brain chemicals (dopamine and norepinephrine) that can help you feel more alert and focused. Meats also contain vitamin B-12, which may help ease insomnia and depression.
Fatty fish, such as salmon, is rich in omega-3 fatty acids, which may protect against depression and be good for heart health. Besides fish, sources of omega-3 include nuts and dark green leafy vegetables.
Folate is another nutrient that may lower the risk of depression. Find it in leafy green vegetables, legumes, nuts, and citrus fruits.