How sunscreen blocks UV and why we should use it

What Is Sunscreen? Sunscreen is a product applied to the skin to safeguard it from the sun’s harmful rays. It works by blocking or reducing ultraviolet (UV) radiation so that it does not damage the skin. The sun emits UV radiation, an invisible type of light that can be harmful. Two types are particularly important: UVB and UVA rays. UVB rays cause sunburn and contribute to skin cancer, while UVA rays affect deeper skin layers, leading to skin aging, such as wrinkles and dark spots, and also contribute to skin diseases. Most sunscreen products display an SPF number, which indicates how well they protect the skin against UVB rays. Although no sunscreen can block all UV radiation, proper use provides significant protection and helps prevent sunburn and skin damage. Why Is Sunscreen Important? Sunscreen helps prevent sunburn and preserve the integrity of the skin. In addition, it reduces the risk of skin cancer and slows down premature skin aging, making it an essential part of daily skin care. Strategies to Reduce Sun Damage To diminish sun-related skin damage, it is recommended to use a broad-spectrum sunscreen with an SPF of at least 30, applied 15–30 minutes before sun exposure. It is essential to reapply every two hours and ensure that all exposed areas, including the face, ears, neck, hairline, and arms, are covered. Combining sunscreen with protective clothing, hats, and seeking shade further enhances skin protection.