Biological Causes of Depression

There are many different biological causes of depression, including hypothyroidism, pyroluria, food intolerances and hypoglycemia. These depression tests will help you find out whether an underlying physical illness may be causing your depression and what neurotransmitters you are low in. There are 13 tests - we suggest you take them all, but you can also find out about each condition by clicking on the links below.


Stress and Lifestyle Factors

Lifestyle factors such as stress, poor diet, lack of sunlight and lack of exercise can all contribute to depression by decreasing the level of neurotransmitters in the brain. Neurotransmitters allow the brain cells to communicate with each other and are responsible for our feelings of happiness, joy, motivation, relaxation and our ability to think clearly.

The five most important neurotransmitters for depression are serotonin, dopamine, GABA, endorphins and acetylcholine. Use the links in the last 2 columns above to find information on each neurotransmitter, including tests to find out which neurotransmitters you are low in, treatment options and the lifestyle factors that can cause neurotransmitter deficiencies and lead to depression.

Stress and lifestyle factors often combine with underlying biological causes of depression. It is important to consider both aspects when looking for the cause of your depression.