Specific hormones that remain unchanged during aging Hormone levels that remain stable as a person ages include Adrenocorticotropic hormone (basal) Cortisol (basal) 1, 25-Dihydroxycholecalciferol Estradiol (in men) Insulin (sometimes increases) Thyroid-stimulating hormone (TSH) Thyroxine Specific age-related hormone increases Hormones that increase in relation to aging are associated with either receptor defects or postreceptor defects, resulting in hypofunction.