Sunscreen is a worthwhile investment that protects the skin from harmful rays. The ingredients in sunscreen vary from product to product but what they have in common is that they expire. It is tempting to keep last years product that has that tropical aroma calling you outdoors, after all, it wasn't cheap. But beware, you are risking the health of your skin if you aren't mindful of the expiration date. Protect your skin and enjoy your summer.