Even though I live in WA and get plenty of rays on my skin I still take a Vit-D supplement as when ever I am required on site we are forced to cover up with long sleeved shirt, long trousers, brimmed hat and sunscreen which basically blocks out the sun.
I take a 1000 ui vitamin D supplement along with a K-2 which apparently aids the digestion and absorption of the vitamin D supplement.
It's amazing how many people are deficient in vitamin D in Australia due to covering up and sunscreen etc.
A woman who was a friend of my family's spine basically crumbled away which was later discovered to be living most of her life deficient of Vitamin D. It can have terrible consequences in overall health.