Vitamin D2 and vitamin D3 are the forms of vitamin D most important to human health, according to the Mayo Clinic. Vitamin D2 is manufactured by plants, while vitamin D3 is manufactured in the skin when it's exposed to the sun.
Population in families living in Washtenaw County ; Total Population: 238,069; Population Under 18 years: 70,878; Population 18 years and over: 167,191
Milan (i/maÉªlÉn/) is a city in Monroe and Washtenaw counties in the U.S. state of Michigan. The population was 4,775 at the 2000 census. About 60% of the city's area and 75% of its residents are located on the Washtenaw County side adjacent to York Township in Washtenaw County; while 40% percent of the city's area and 25% of its residents are located on the Monroe County side adjacent to Milan Township.