As the weather gets sunnier, it’s crucial to remember the importance of protecting your skin from harmful UV rays. However, many people may not realize that sunscreen has an expiration date and that its effectiveness can be compromised if not stored correctly.
Dr. Paul Banwell, founder of The Melanoma and Skin Cancer Unit (MASCU), emphasizes the need to check sunscreen expiration dates. Even if there is no visible date, it is generally advisable to use sunscreen within three years of purchase. If the product exhibits changes in color, texture, or scent, it may be a sign of expiration.
Using expired sunscreen can lead to various risks, including sunburn, premature aging, and increased susceptibility to skin cancer. As active ingredients degrade over time, the sunscreen’s ability to protect against UV rays diminishes. Dr. Munir Somji, an aesthetics doctor, underscores the necessity of using fresh, high-quality sunscreen daily for comprehensive sun protection.
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The longevity of sunscreen also relies on its formula, whether it is chemical or mineral-based. Chemical sunscreens, which absorb UV rays, tend to deplete faster due to certain ingredients' susceptibility to oxidation when exposed to sunlight, heat, or moisture. On the other hand, mineral sunscreens, which form a protective barrier on the skin, often last longer and are free from harmful chemicals.
Proper storage is vital for ensuring sunscreen efficacy and longevity. Storing sunscreen in a cool, dry environment, away from heat and moisture, is recommended. Dr. Ed Robinson advises against leaving sunscreen in places such as car dashboards, glove compartments, windowsills, or bathrooms near heat sources, as these conditions can degrade the formula and affect its stability.
It’s important to understand the Sun Protection Factor (SPF) of the sunscreen you use. Kimblerley Medd, clinic lead at Face the Future, highlights the significance of SPF 30, which is recommended by most dermatologists. Regardless of the SPF level, regular reapplication every two to three hours is crucial to ensure continuous protection against UVB rays.
By storing sunscreen correctly and being mindful of its expiration, individuals can maximize its effectiveness in safeguarding their skin from the sun’s harmful rays.