The Better-Mood Diet: 7 Foods That Can Make You Feel Happier

"An excellent source of protein, beef and other lean meats also provide us with the amino acid tyrosine, which is needed for the production of dopamine, the neurotransmitter that gives us energy, excitement, power, and our ability to move. It also enhances brain signaling, thus improving attention and focus," Zembroski says. "When we don't consume enough tyrosine, the reduction in dopamine production can cause ADD, hyperactivity, obesity, addictions, and fatigue."