There are many symptoms as a result of neurotransmitter imbalances or neurotransmitter deficiency, but these are some of the most common:
It’s also important to note the symptoms of neurotransmitter imbalances or deficiencies overlap with many other conditions like adrenal fatigue, thyroid problems, and hormone imbalances, so neurotransmitter testing or screening is always recommended to rule out other possibilities.
Source: Holistic Help.net