The experts explain that a brain chemical called serotonin can affect mood and appetite.

Triptans, in contrast, work on another brain chemical called serotonin.

Behavior disorders in children with low levels of a brain chemical called serotonin.

Interest was also aroused in a chemical called serotonin.

And it may cause problems with a brain chemical called serotonin that affects mood.

These drugs work by altering the amount of a chemical in the brain called serotonin.

That gene is one of many genes linked to a brain chemical called serotonin.

These medications act in the brain on a chemical messenger called serotonin.

Not having enough of a brain chemical called serotonin may help cause the problem.

These chemicals might work similar to another chemical in the brain called serotonin.