My parents were both declared vitamin D deficient late last year so I assumed I probably was too. Been taking vitamin D supplements since December, think I've got enough to last until late April. Might carry on taking them all year if the dull weather continues!
I do find it a bit baffling when some people think suncream is only for holidays abroad! I was in Majorca in the last week of September last year and the UV index got up to 7. My usual Factor 15 twice a day was fine for me as a fair-skinned blonde.