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
Homefacts City Report. Washougal is located in Clark County, WA. The population is 14,031, making Washougal the 8th largest city in Clark County. There are 9 public schools in Washougal with an average Homefacts rating of B+. The total crime rate for Washougal is very low, and there are 3 registered sex offenders residing in the city.