I've read that vitamin D can play a role in cancer prevention at a cellular level. Our bodies synthesize vitamin D using UVB in sunlight. You'll notice that m

I've read that vitamin D can play a role in cancer prevention at a cellular level. Our bodies synthesize vitamin D using UVB in sunlight. You'll notice that most of the states at the bottom of the list (except DC ?!?) are sunny places, so I wouldn't be surprised if that is a contributing factor.