Do Vitamin D supplements really help with acne?

I used to have some acne on my face but its all cleared up. However my back/front and shoulders are pretty bad and I don't like it. I did some searching on the internet and everybody talks about how well vitamin D supplements seem to work. Apparently its good for way more than only acne but supposedly acne is linked to a vitamin d deficiency. Can anyone comfirm this? If it is as good as it sounds I'm going to buy some.
Do Vitamin D supplements really help with acne?
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