If you’ve ever stood in the sunscreen aisle wondering which product actually protects your skin, not just what claims to, you’re not alone. For many men and women in their 30s, 40s, and 50s, sunscreen has gone from an afterthought to a daily essential. And for good reason: skin cancer is the most common form of cancer in the United States, and cumulative sun exposure is one of the biggest contributors. Here in coastal New England, especially in Kennebunk, sun exposure is ofte