Many patients with injuries to the left sides of their brains also experience depression, because a region on the left front of the brain is involved in mood control. (scientificamerican.com)
In fact, the greatest concentration of serotonin, which is involved in mood control, depression and aggression, is found in your intestines, not your brain. (articles.mercola.com)
Exercise promotes mental health by normalizing insulin resistance and boosting the production of hormones and neurotransmitters associated with mood control, so when you stop working out, your levels of «feel good «hormones like endorphin and dopamine will drop. (fitnessandpower.com)