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Sunscreen is a crucial skincare product that helps protect the skin from the harmful effects of ultraviolet (UV) radiation. Here are some important facts about sunscreen:
- UV Radiation Protection: Sunscreen works by either absorbing, reflecting, or scattering the sun’s UV rays. It contains active ingredients that provide protection against both UVA and UVB rays, which can cause sunburn, skin aging, and skin cancer.
- SPF (Sun Protection Factor): SPF indicates the level of protection against UVB rays. The higher the SPF number, the greater the protection. SPF 30 is considered adequate for daily use, but higher SPF (e.g., SPF 50+) is recommended for prolonged sun exposure or for individuals with fair skin.
- Broad-Spectrum Protection: Effective sunscreens provide broad-spectrum protection, meaning they protect against both UVA and UVB rays. UVA rays penetrate deeper into the skin and contribute to premature aging and skin cancer, while UVB rays primarily cause sunburn.
- Application Amount: To achieve the SPF indicated on the label, sunscreen should be applied generously and evenly to all exposed skin areas. The recommended amount is about a shot glass (1 ounce) for the entire body and a nickel-sized dollop for the face.
- Reapplication: Sunscreen should be reapplied every 2 hours, or immediately after swimming, sweating heavily, or towel drying. Even water-resistant sunscreens lose their effectiveness over time, so regular reapplication is crucial for continued protection.
