(Yes) One randomized trial shows some promise, but at extremely high doses of 100,000 IUs.
(No) A large meta-analysis shows not effect and says "future trials with similar designs are unlikely to alter these conclusions."
by Alexei Andreev Feb 28 2015 updated Aug 4 2015
(Yes) One randomized trial shows some promise, but at extremely high doses of 100,000 IUs.
(No) A large meta-analysis shows not effect and says "future trials with similar designs are unlikely to alter these conclusions."