A recent study examined the link between skin pigment and vitamin D levels, reaffirming the idea that people with darker tend to have more acute deficiencies.
The study, which was published in the Archives of Internal Medicine, surveyed 18,863 people, including several ethnicities. According to the KaiserNetwork.org, the study authors say that lighter-skinned people can boost vitamin D levels by getting 10 to 15 minutes of sun daily, while those with darker skin need about five times that amount.
Source:
KaiserNetwork.org: Kaiser Health Disparities Report: A Weekly Look At Race, Ethnicity And Health