As a dermatologist and lifelong swimmer, I hear a lot of misinformation about sunscreen—especially from athletes and patients who spend long hours outdoors. These myths can lead to sun damage, premature aging, and an increased risk of skin cancer. Let’s set the record straight.
Myth #1: You don’t need sunscreen on cloudy days
Truth: Up to 80% of UV rays can penetrate clouds, so sun protection on cloudy days is still essential.
Overcast skies can create a false sense of security because the sun feels less intense. But UVA rays—responsible for premature aging and skin cancer—still penetrate cloud cover. And since weather can change throughout the day, it’s always best to take preventative measures and protect your skin with a dermatologist-recommended sunscreen.
Myth #2: Higher SPF means all-day protection
Truth: SPF measures how long you’re protected—not how strong the sunscreen is.
An SPF 50 sunscreen doesn’t mean you're good to go for the whole day. Sweat, water, and time degrade sunscreen's effectiveness. Reapplication every 2 hours (or immediately after swimming or sweating) is key—no matter how high the SPF.
Myth #3: Sunscreen causes breakouts and clogs pores
Truth: Not all sunscreens are created equal—many are designed for acne-prone skin.
Modern formulations are non-comedogenic, lightweight, and breathable. Dermasport’s Daily SPF 30 Facial Moisturizer, for example, is dermatologist-tested and safe for sensitive or acne-prone skin. With the right formula, you can protect your skin without sacrificing clarity.
Myth #4: Sunscreen is only necessary at the beach or pool
Truth: If you’re outside—even for a workout or commute—you need sunscreen.
Incidental exposure during runs, bike rides, dog walks, or even sitting by a window can add up. Over time, this leads to sun damage, fine lines, and discoloration. Daily use helps protect against cumulative UV and blue light damage—keeping skin healthy and resilient.
Myth #5: You can’t get a tan if you’re wearing sunscreen
Truth: You can still tan—sunscreen reduces UV exposure, but doesn’t block it completely.
SPF 30 blocks about 97% of UVB rays, which are the burning rays and SPF 50 about 98%—but it is UVA that gives you a tan and that is not blocked nearly as well by most sunscreens Most people also don’t apply enough or forget to reapply, which lets even more UV through. While sunscreen helps prevent burns and long-term damage, it doesn’t make you immune to tanning, especially with prolonged exposure.
When it comes to sunscreen, the truth matters—especially for those of us who spend hours training, competing, or simply enjoying life outside. The right knowledge empowers you to make smarter choices about sun protection to avoid putting your skin at risk. By understanding how sunscreen really works—and choosing formulas designed for active lifestyles—you can protect your skin today and preserve its health for the long haul.
- Dr. Chris Schmidt
