Everyone’s is different, but we all have one thing in common: Skin, and it needs protection.
While many people understand the importance of using sunscreen during the summer when the sun is strong, few realize that it's just as important during the winter. Whether you're skiing, snowboarding, or just enjoying outdoor activities, sunscreen should be part of your routine. The reflection from snow and higher altitudes increase exposure to UV rays, so sunscreen is essential even in colder months. If you're spending more than 20 minutes outside, always apply SPF 30 or higher.
Understanding UV Rays and Skin Protection
The sun emits two types of ultraviolet (UV) rays:
- UVA (Aging): Longer wavelengths that penetrate deep into the skin, causing wrinkles and contributing to skin aging and skin cancer.
- UVB (Burning): Shorter wavelengths that cause sunburn and can also lead to skin cancer.
Sunscreen helps protect against both types of UV rays. Using it not only lowers the risk of skin cancer, but it also helps your skin age more slowly. Photoaging, or skin aging caused by the sun, can lead to wrinkles, spots, and long-term damage. So, always remember to apply sunscreen at least 15 minutes before going outdoors, and don’t forget to reapply every 2 to 4 hours while exposed to the sun.
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How Much Sunscreen to Use
Doctors recommend using about one ounce (the size of a shot glass) of sunscreen for your entire body, including your face. If you have sensitive skin, there are sunscreens formulated specifically for the face, but be cautious—many of these products share the same ingredients as those designed for the body.
Failing to wear sunscreen puts your skin at risk of photoaging, leading to long-term damage like wrinkles and discoloration. To avoid this, make sure you apply enough sunscreen, and reapply as needed.
Understanding SPF and UVA/UVB Protection
The SPF label on sunscreen indicates its level of protection against UVB rays. Keep in mind that SPF only reflects protection from UVB, not UVA. To ensure you're protected from both, look for sunscreens that include ingredients like:
- Avobenzone
- Zinc Oxide
- Titanium Dioxide
- Mexoryl
These ingredients offer broad-spectrum protection, covering both UVA and UVB rays.
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SPF 30 vs. SPF 50: What You Need to Know
If you’re planning a day at the beach or engaging in any outdoor activity, opt for a sunscreen with at least SPF 30. Many people believe that a higher SPF number allows them to apply less or skip reapplying throughout the day, but this is a misconception. Here's how it breaks down:
- SPF 30: Protects against 96.7% of UV rays.
- SPF 50: Protects against 98% of UV rays.
No matter which SPF you use, it’s crucial to reapply after a few hours—especially if you're swimming or sweating.
Water-Resistant Sunscreens: Know When to Reapply
Even if your sunscreen is labeled water-resistant (note that no sunscreen is completely waterproof), it still needs to be reapplied after spending 40 to 80 minutes in the water. Check your sunscreen’s label for the exact duration of water resistance.
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Protect your skin year-round with our broad-spectrum sunscreens. Visit BU Sunscreen to explore sunscreens for both summer and winter protection.
Want more information on sun safety? Check out these resources from the Skin Cancer Foundation.
