In this context, understanding UV radiation is essential for selecting the most appropriate sunscreen. The majority of UV radiation that reaches the Earth’s surface consists of UVA, while a smaller proportion is UVB. To quantify UV exposure, the Ultraviolet Index (UVI) is used to measure the intensity of UV radiation at the Earth’s surface. Therefore, it is recommended to wear sunscreen daily for protection against UV radiation. Regardless of the SPF used, sunscreen should be reapplied every two hours, and more frequently after swimming or excessive sweating, to maintain effective protection.

Source: The Star February 16, 2026 14:54 UTC