Ultraviolet light exposure does help psoriasis, however, so a little sunshine (not too much, because sunburns can make psoriasis worse) on psoriasis plaques can be a good thing.
But, because we worry (and rightly so) about skin cancer, we shield our skin from the sun's
ultraviolet light with clothing and sunscreen, which makes it impossible for our bodies to manufacture Vitamin D. Breast milk was never meant to be the source of vitamin D for our babies (as we are all intended to make our own vitamin D with
exposure to sunlight), but as we continue to be cautious about
exposure to sunlight, babies
do not make enough Vitamin D, nor
do they receive enough in breast milk.