Celebrating National Sunscreen Day: How Your SPF Really Works and Why Better Options Are Coming
Thick and creamy, gloopy or spray-on, sunscreen can be confounding. Some formulations are heavy and chalky, while others are clear and lightweight. Some come as lotions; others are sprays, sticks, or gels. Then there are the labels: “broad spectrum,” “water-resistant,” and the ever-present SPF (Sun Protection Factor). What do these numbers really mean, and how […]