Land affected or burdened by an easement is called a servient estate, while the land or person benefited by the easement is known as the dominant estate.. If the easement benefits a particular piece of land, it is said to be appurtenant to the land.
Vitamin D obtained from sun exposure, food, and supplements is biologically inert and must undergo two hydroxylations in the body for activation. The first occurs in the liver and converts vitamin D to 25-hydroxyvitamin D [25(OH)D], also known as calcidiol.
Human skin-derived VD3 is produced from 7-dehydroxycholesterol upon exposure to ultraviolet B radiation (UVB, wavelength 290â315 nm). As a fat-soluble vitamin, dietary vitamin D is incorporated into chylomicrons and transported via lymphatics into the venous circulation. Some of the dietary vitamin D is extracted by adipose tissue and muscle, but the remainder and most of the endogenously synthesised vitamin D is transported to the liver.