I've been doing that for a few years now, doesn't seem to make any difference.
Yeah, same. Made no difference.
Not OP, but it made no difference for me too because I was taking vitamin D pills that did almost nothing. The doctor prescribed me little bottles that had high vit D and I had to take it once a week and I felt a bit better. Idk if you already tried it, but if pills don't help, you should try with something more strong (like 10k IU) but you should be aware that if you don't do any tests, you could take too much and have vit D toxicity.
works on my machine although the change from off to on isn't a total cure turnaround