“…And serotonin does many of the harmful things that estrogen and prolactin do, including a direct cause of bone loss. People who take the fluoxetine type of antidepressants are seen to have a lot of premature bone loss because of the excess exposure to serotonin and the associated prolactin. And serotonin is, in a way, kind of a cofactor for estrogen. Estrogen increases serotonin systemically, and serotonin, in turn, increases the production of estrogen. So when one gets out of control, they both tend to become dominant. And serotonin is involved in the inflammations produced by estrogen.”