3 ms·

Examine.com is a good starting point https://examine.com/supplements/vitamin-d/ https://examine.com/supplements/vitamin-d/ If you scroll down to human effect m

• repsak 9y ago
  To add some anecdotal evidence... We basically get no sun for half of the year where I live. I find my subjective wellbeing has increased somewhat, especially during the winter months, since I started supplementing with 5000UI D3. 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 https://www.gwern.net/zeo/Vitamin-D