We know your makeup and skin care items won’t last forever, but for how long are they good? They do have an expiration date. While it won’t kill you to use them after this date, they may lose effectiveness or could harm you (more chance to be exposed to bacteria). This article has previously appeared in dermstore.com. Want to know specifically how long your coveted items last? Here, dermatologists Dr. Tsippora Shainhouse, MD, FAAD tell all. UPDATE: Ulta Back in stock: FREE 25 Pc Beauty Bag with any $60 online purchase. Offer valid thru 9/1. Sunscreen Though you don’t need us to remind you that wearing sunscreen is important every single day (and not only in the hottest heat wave of summertime), most people…