Why does tanning, an increase in skin pigmentation after UV exposure, offer limited protection against sunburn compared to using sunscreen with a high SPF?

💡 Explanation

Tanning provides limited sunburn protection because melanin absorbs UV radiation, but the amount produced naturally offers a relatively low sun protection factor (SPF). Therefore, while melanin does offer some defense, sunscreen provides broader spectrum and higher intensity protection, rather than relying solely on the body's natural response.

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