I'm word mincing with how you titled this thread Garrett.
This statement assumes all black people have a Vitamin D deficiency. I would argue this isn't the case. With the amount of Vitamin D that is pumped into even cheap milk, and milk is a very common beverage in all public schools I've visited, I fail to see how the African American population as a whole is suffering from a huge Vit D deficiency.
This would also assume all people who never get out in the sun every also suffer from this deficiency.
Did you read this sentence? Horrid place to do a study:
Furthermore, my patients come directly from prison or jail, where they get little opportunity for sun exposure.
It doesn't take someone smart to figure out that is a biased study right there.
Don't get me wrong, people with poor diets will have poor immune systems. But this article suffers in some places.