People are always preaching of the bad effects that the sun has; such as melanoma. But what about the good affects that it has on us. When we get adequate amounts of sun our pituitary gland along with other organs of your endocrine system such as your thyroid gland help us to feel our best. Our pituitary gland has a hormone that controls the thyroid called the Thyroid Stimulating Hormone or TSH. TSH controls your thyroid and how active it is and how much of the hormone Thyroxin (T4) is released.