[tdrp]

I got back to normal after about a month of supplements and sunlight. It happened to me again a couple of years later to a much lesser degree since I had just forgotten about supplements and then once again was resolved the same way.

[bennyelv]

Don’t confuse correlation and causation. Maybe you were going to get better anyway and it just coincided with the supplements. Maybe the second time was something completely different.

I did X and now I feel better is completely meaningless without some quantitative supporting evidence providing a link between the two.

There’s a reason why the double blind trial is the gold standard of medical proof.

You may of course have this evidence, I’m just commenting on what’s written in this comment.

[medntech]

This was the point I was leading them to. Thanks!

A billion people are vitamin D deficiency. Many are asymptomatic.

Did you have a viral illness causing your symptoms and it got better? Was it the vitamin D? It is hard to say. Some supporting evidence would be you had a previously normal vitamin D level back at your old GP.