Examine.com is a good starting point https://examine.com/supplements/vitamin-d/
If you scroll down to human effect matrix you can find links to studies based on results found.
The summary at the bottom is also pretty good.
If you scroll down to human effect matrix you can find links to studies based on results found.
The summary at the bottom is also pretty good.
Other potential benefits are harder to measure, but the cost in terms of money and likelihood of adverse effects is so low I feel I might as well continue.
To add another data point, gwern has done some more rigorous self experiments https://www.gwern.net/zeo/Vitamin-D