What is the most effective sun screen?

The most effective sunscreen offers broad-spectrum protection against both UVA and UVB rays, with a minimum SPF of 30. Look for water-resistant formulas if you’ll be sweating or swimming, and consider options with mineral ingredients like zinc oxide or titanium dioxide for sensitive skin. Regular reapplication every two hours, or more often if swimming or sweating, is crucial for maintaining effectiveness. Always check for the latest recommendations and reviews to find a product that suits your skin type and activities.