It appears that Vitamin D may play a greater role in the body than once thought.  Vitamin D is important for bone health, depression, autoimmune disorders, and now it appears to have a link to asthma.  Asthma incidence is higher among ethnic minorities in poor urban and inner-city areas, with the District of Columbia having some of the highest rates in the Nation. It is well-understood that African-Americans have lower levels of Vitamin D than other racial groups. In a new study, researchers found that African-American children with asthma in Washington, DC are more likely to have Vitamin D deficiencies.