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
Burt, MI. Burt is an census-designated place (CDP) for statistical purposes in Taymouth Township, Saginaw County in the U.S. state of Michigan. The CDP's population was 1,122 at the 2000 census. Burt is also the name of a post office with ZIP code 48417, which includes the area of the CDP as well as portions of Taymouth Township to the north of the CDP and the eastern part of Albee Township and a small area of southeastern Spaulding Township. The town is named for Wellington R. Burt. According to the United States Census Bureau, the CDP has a total area of 4.5 square miles (11.8 kmÂ²), all land. As of the census of 2000, there were 1,122 people, 394 households, and 327 families residing in the CDP.