Over the course of a lifetime, hormones play a number of roles in both men and women. They participate in multiple functions such as growth, reproduction, emotional balance and energy equilibrium. Hormones are secreted by various organs of the endocrine system but imbalances can and do occur. Production of certain hormones declines with age, particularly growth hormones and sex hormones such as oestrogen and testosterone. Hormone supplementation may then be indicated, although other molecules have also been shown to compensate for inadequate secretory activity by the endocrine system. Why not benefit from these molecules by taking them as dietary supplements.