Many steels add to the iron-steel mix other metals that give the entire substance desirable properties such as strength, heat resistance, or flexibility. Steel is considered a mixture rather than a compound because the iron does not chemically bond with the carbon and other components.
Some of estrogen's effects include: 1  Increasing serotonin, and the number of serotonin receptors in the brain. 2  Modifying the production and the effects of endorphins, the feel-good chemicals in the brain. 3  Protecting nerves from damage, and possibly stimulating nerve growth.
The lessons are these: Estrogen is good for 6 things: 1  Starting you periods. 2  Starting Labor. 3  Making you fat, increasing body fat mostly from the waist down while decreasing lean muscle mass.  Creating depression and PMS style mood swings all the 1  time. Causing sexual dysfunction.  Causing fibrosis and cancer of the breast, cervix and uterus.