Sun Protection 101—Your Guide to Sunscreen - Takeaways - MDSpire
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Essential Guide to Sunscreen: Understanding Sun Protection

  • By

  • Gregory A. Ugoh

  • Henry W. Lim

  • June 1, 2026

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  • 1

    Sunscreen is crucial for preventing sun damage, premature aging, and skin cancer.

  • 2

    There are two main types of sunscreen: chemical, which absorbs UV rays, and mineral, which reflects them.

  • 3

    SPF indicates protection duration against UV-B rays; higher SPF offers slightly more protection but requires regular reapplication.

  • 4

    Water-resistant sunscreens protect for up to 40 or 80 minutes, but reapplication is necessary after swimming or sweating.

  • 5

    Apply sunscreen 15 minutes before sun exposure using the teaspoon rule for full coverage, and consider mineral options for sensitive skin.

Original Source(s)

Sun Protection 101—Your Guide to Sunscreen

  • by Gregory A. Ugoh, Henry W. Lim

  • June 1, 2026

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