The human body always tends to maintain a very balanced state called HOMEOSTATIS. The body is accustomed to this condition and feels comfortable with it. Sometimes, there is an intake of external substances which cause a significant increase raising the body level beyond the homeostatic level. On such an occasion, the body will respond by reducing its own production of such substances in an effort to re-establish the normal levels which are comparatively lower. This calls for the same in the case of hormonal production in the body. As and when the use of external substances is discontinued, the body’s own production of hormones dips below normal. The overall level of the body is thus, suppressed or down.