2. Lack of Protein
You might associated protein with muscle building. However, adequate protein, or lack thereof, can impact the onset as well as severity and duration of depression. Scientists from the US National Institutes of Health suggest that diets low in protein and associated essential amino acids (many of which are provided via diet alone) can impact the operation of the central nervous system dysfunction, impact brain function, and cause depressed mood and aggression due to the lack of amino acids (i.e., tyrosine and tryptophan), which play a role in production of “feel good” neurotransmitters like dopamine and serotonin.