Sunscreen Myths Debunked: Health Bureau Advises Understanding SPF and PA for Effective Protection

As summer temperatures soar, the Kaohsiung City Health Bureau is reminding residents that sunscreen is essential for outdoor activities, but its effectiveness hinges on understanding and debunking common misconceptions. The bureau urges the public to look beyond simply high SPF numbers and grasp the distinct roles of SPF and PA.

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SPF (Sun Protection Factor) mainly protects against UVB ultraviolet rays that cause sunburn and redness, and the number indicates the extension of time before sunburn occurs.

SPF, or Sun Protection Factor, primarily shields against UVB rays, which cause sunburn and redness. The number indicates how much longer skin is protected from burning. PA, marked by plus signs (PA+ to PA++++), combats UVA rays that lead to skin darkening and aging. The highest PA rating can extend protection against darkening by over 16 times.

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PA (Protection grade of UVA) is for protection against UVA ultraviolet rays that cause skin darkening, and the protection effect is indicated by '+' signs, ranging from PA+ to PA++++, which can delay skin darkening by more than 16 times at the highest level.

For daily commutes or shopping, SPF 30 and PA+++ offer sufficient protection. However, for prolonged outdoor work, sports, or beach trips, higher SPF products may be necessary. The bureau stresses that reapplying sunscreen every two hours, or more frequently if sweating, is crucial for maintaining adequate defense. It also advises a patch test before widespread use to check for allergic reactions.

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For daily commuting, shopping, and other general outdoor activities, choosing products with SPF30 and PA+++ already provides basic protection.

Finally, thorough cleansing after applying sunscreen is vital. Residual product can clog pores, leading to skin irritation or other issues. By following these principles, selecting the right product, reapplying diligently, and cleansing completely, individuals can effectively protect their skin from UV damage and enjoy outdoor activities safely.

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Sunscreen products should also be replenished in a timely manner. The Health Bureau suggests that sunscreen products should be applied 30 minutes before going out and replenished every 2 hours depending on sweating to maintain sufficient protection.