Cortisol
One hormone that does not appear to decrease with age is melatonin. Melatonin is a hormone produced by the pineal gland that helps regulate sleep-wake cycles and has antioxidant properties. It tends to remain relatively stable throughout a person's life.
Insulin is the hormone that causes the blood sugar level to decrease.
Typically, the production of growth hormone starts to decline around the age of 30. This decline is gradual and can vary from person to person. By the time a person reaches middle age, the decrease in growth hormone production may become more noticeable.
The Parathyroid hormone has a decrease in plasma calcium. It uses a Pentagastrin as stimulation for its release.
calcitonin
growth hormone
Andropause
Thyroid releasing hormone (TRH) is released when thyroid hormones are low. Increased thyroid hormone production would serve to inhibit/decrease TRH release.
Andropause
The hormone is called as calcitonin. This hormone is secreted by the parathyroid glands.
In some cases, the renal threshold does decrease with age. But not everyone will have a decrease.
ACTH is stress hormone. It should decrease the oral secretions. Rather it will decrease the oral secretions.