I've never taken Vitamin D supplement at all since I've lived in Vancouver. And Vancouver's weather really is not that much different from Seattle's.

Nor has any doctor recommended this to me. I actually had a dermatologist examine my face for any possible growth, (plus my whole body). Whew, I was clear but heavily advised about the sun block.

I'm sure I'll hear a lecture from sister-doctor if I suggest ingesting Vitamin D supplement. She'll laugh at me: You? Who is outdoors cycling enough year round?

You see, I hear her muttering about patients not understanding the consequences about taking too much vitamin E, etc. without doctor's knowledge.