Just been to see my endrocinologist and he was VERY HAPPY with my Vitamin D level of 191 ng/ml. And he had heard it has a link to helping in MS, from a conference he had been to last year. So he sees a connection. He even said he himself was taking it.
He had prescibed a megadose of 600K by injection this time last year, and it was supposed to replace having to supplement, but a test not long after the injection showed my level at 100, so I continued with 5,000 per day over summer, and increased to 10,000 over winter. And the level of 191 was taken just after the end of Winter in Sept.
I had thought he might have told me I was overdoing it, as the GP had said, but the specialist was very supportive. He said toxicity can occur, but he would not think to worry unless it got over 300. He said he tests all his other patients, particularly those with thyroid conditions and diabetes and prescribes the dose for them.
I mentioned that I bought the 5,000 and 10,000 capsules over the internet, as Australia does not sell any over 1,000. He said that he can get a compounding chemist to make the larger doses if required. Which is what he did for the injection.
But he definitely has seen some studies presented to give him the view that it is worthwhile. He seems to be on top of the game, and taking notice of papers presented at conferences when they may not be generally accepted.