Scientists at Massachusetts General Hospital have come to the surprising conclusion that a regular burger can help lift your spirits. It turned out that beef is almost the only food associated with a lower risk of depression.
If the thought of vegetable salad makes you frown, then the image of a juicy burger involuntarily cheers you up. A study of over 440,000 people found that beef is the only food associated with a lower risk of depression. Beef contains iron and B vitamins, which are known to aid brain function and may be responsible for this amazing psychological effect.
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This is the first study demonstrating a possibly beneficial causal effect of beef on reducing the risk of depression. The more actively people leaned on this type of meat, the more protection they received from depressive disorders.
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Scientists have studied which genes are associated with eating more beef. They then determined whether these genes were associated with a risk of depression. Lean fish, as it turned out, even increased the risk. It is not entirely clear why beef provides such protection. It is possible that the nutrients it contains, including zinc, iron, and proteins, are responsible. (READ MORE) 
Massachusetts General Hospital
Health
one of the largest teaching hospitals in United States located in Boston, Massachusetts