Which of the following hormonal concentration decreases with age?
**Core Concept**
The question is testing the understanding of the effects of aging on hormone concentrations, specifically focusing on the decline of certain hormones with advancing age. This concept is crucial in endocrinology, as hormonal imbalances are common in the elderly population and can lead to various clinical manifestations.
**Why the Correct Answer is Right**
As people age, there is a natural decline in the production of certain hormones. One such hormone is **Dehydroepiandrosterone (DHEA)**. DHEA is a steroid hormone produced by the adrenal glands and plays a crucial role in the regulation of various physiological processes, including metabolism, immune function, and bone health. With aging, the production of DHEA decreases significantly, leading to a decline in its beneficial effects.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect as **Insulin** levels may actually increase with age, particularly in the context of type 2 diabetes, which is more common in older adults.
* **Option B:** This option is incorrect as **Thyroid-stimulating hormone (TSH)** levels can increase with age, particularly in the context of primary hypothyroidism, which is more common in older adults.
* **Option C:** This option is incorrect as **Cortisol** levels can actually increase with age, particularly in the context of stress and chronic diseases.
**Clinical Pearl / High-Yield Fact**
Aging is associated with a decline in the production of various hormones, including DHEA, which may lead to a range of clinical manifestations, including osteoporosis, weight loss, and decreased immune function.
**Correct Answer: C. Cortisol levels may increase with age, but DHEA is the correct answer here: DHEA levels decrease with age.