Overview

• New guidelines recommend applying sunscreen at a UV-Index of 3 or higher, using 2 mg/cm² of skin, and reapplying every two hours or after swimming or sweating.
• Broad-spectrum sunscreen use does not significantly impact vitamin D levels, with brief unprotected exposure twice weekly sufficing for synthesis.
• Experts stress integrating sunscreen with shade, protective clothing, and avoiding peak UV hours for comprehensive sun protection.
• SPF 30–50+ is advised for optimal defense, with higher SPFs prolonging protection without preventing tanning.
• Environmental and health considerations highlight the need for careful sunscreen selection, avoiding harmful chemicals and ensuring adequate application.