The relative amount of one amino acid, like tryptophan, to the others, is what makes the difference when it comes to mental health. Dr. Michael Greger, MD of NutritionFacts.org posted an interesting video about the importance of high tryptophan levels, relative to other amino acids, when it comes to boosting serotonin levels and treating depression. So eating animal protein, for example, isn’t helpful for boosting serotonin, whereas consuming seeds (pumpkin, sesame, butternut squash, etc), which have a particularly beneficial tryptophan to protein ratio, is helpful. I would advise eating raw (and sprouted if possible) seeds, as roasting the seeds alters the amino acid ratios.
We have long been testing the blood for amino acid imbalances in patients with mood disorders. Formulating the appropriate amino acid blend to create healthy amino acid balance, based on symptoms and the blood test results, makes a big difference in producing positive change. The most impressive changes I have witnessed in practice are with patients facing the challenges of anxiety, depression and autism disorders.