This vitamin, when used topically, can help strengthen the skin barrier to improve moisture levels and reduce the appearance of pores, according to Paula’s Choice Skincare. We reveal the insider tips that will help make your dream a reality. Of course, there are environmental factors that may be out of your control here, but if you suspect something is going to town on your acid mantle, it still pays to revisit your products to make sure they’re effectively counteracting whatever is doing…