Maye it's more helpful in women?
Or just Asian women?
Maybe it has been helpful to you, and if you had not had a higher level of D in your diet you would have developed diabetes sooner?
Perhaps it's an ‘all else being equal’ for people who are insulin resistant, vitamin D is helpful.
Just speculatin’.
The lecture I saw last week mentioned Vitamin D being beneficial for Type 1 diabetes. They didn't say anything about Type 2.
What really caught my eye was all six different studies this lecturer cited showed similar reductions (50%-75%!) in the rates of certain cancers and MS. Apparently, the current gubmint RDA for Vitamin D is way off the mark on the low side.
There is far more to it than this study.
Check out this thread.
http://www.freerepublic.com/focus/f-chat/1929828/posts
There are links that can be followed to several big time benefits.
If you are interested, there are several other good studies that offer a host of other benefits from >2000 units per day. They can be googled