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
Unmarried population in Washtenaw County under 18 years old in homes ; Total Population: 71,741; Unmarried partner of home lead present: 4,031; In family homes: 3,786; Population of male led and male partner homes: 95; Population of male led and female partner households: 1,287; Population of female led and female partner households: 395