Which hormone production is increased with exposure to sunlight?

Exposure to sunlight leads to an increase in the production of melanocyte-stimulating hormone (MSH). MSH is produced by the pituitary gland and plays a crucial role in stimulating the production and release of melanin from melanocytes in the skin. This process is essential for adjusting skin pigmentation in response to UV radiation, as increased melanin helps protect the deeper layers of skin from potential damage caused by sunlight.

Sunlight exposure helps the body regulate various hormones, but MSH's direct link to melanin production specifically responds to environmental light. This increased melanin production not only darkens the skin but also provides a protective effect against further UV exposure. Other hormones listed may be affected by different factors, but the role of MSH in response to sunlight exposure is particularly well-established in physiology.