Here's an important bit from that Newsweek piece that wasn't quoted:
So maybe let's just be a little more wary of casually blaming biological causes for different outcomes between racial/ethnic groups.However, other researchers urge caution in interpreting the results of these studies, especially as they have not yet been peer-reviewed.
"These are both provocative but not even close to definitive," Daniel Culver, Director of the Interstitial Lung Disease Program in the Department of Pulmonary, Medicine at the Cleveland Clinic told Newsweek. "Both of these studies are 'causal inference' studies—in other words association studies that attempt to look at whether a certain exposure (in this case Vitamin D) is correlated with a certain outcome."
"Causal inference studies are difficult to perform because there are a large number of potential missteps that can lead to erroneous conclusions. For example, if vitamin D levels are really a marker for better diet, or more access to healthcare, or any of a variety of other variables that are not statistically assessed, then it is not the vitamin D that is the cause of the better or worse outcomes but rather the other factors."