), you need to be watchful for increased blood pressure, headaches, or insomnia. These side effects
are indications that an excessive stimulation of
the nervous system has occurred. Do not take these amino acids if you are currently taking standard antidepressant medications. Do not take these amino acids if you are suffering from any of the following conditions: phenylketonuria (pKU), hepatic cirrhosis, or melanoma.
Melatonin is helpful for some cases of seasonal affective disorder.