People may not know, or care that much about how their brain, and neurotransmitters function, but they make up a major part of your whole personality.

The chemical serotonin is responsible for sending neurological signals to your brain to help regulate your mood, increase your digestion, and your sleep patterns. Learn the signs of low serotonin levels, and find out if you may have one...

1. Troubling insomnia.

The amount of serotonin in your body directly affects how well you sleep because it effects your body can produce melatonin.