Why women are moody: A neurochemical explanation

The fact that the women in the Swedish study had more serotonin receptor sites sounds like good news. So, too, does the other finding, which was that women had lower levels of a protein that ‘mops up’ used serotonin…

In fact, the Swedish research suggests something else. When cells are short of a chemical, such as serotonin, they open up as many receptor sites as possible to ‘catch’ every morsel…

For women to have more serotonin receptor sites and be holding on to available serotonin longer seems to indicate they had too little available in the first place.