You've probably noticed that your shadow is shorter at some points during the day than others, and this can tell you a lot about the status of the sun. “If your shadow is shorter than you are, UV exposure is high,” says Andrea Suarez, MD, FAAD, a board-certified dermatologist based in Houston in a TikTok. “If your shadow is taller than you are, UV is less intense.”
@drdrayzday Estimate intensity of UV rays from ☀️ with the shadow rule. #sunsafety #sunsafe #sunsafetytips #skincaretips #dermatologist #drdray #drdrayzday ♬ original sound - sped up songs ❤️?
- Ivy Lee, MD, board-certified dermatologist
The stronger the UV rays, the more likely you are to experience sun damage. These short shadows are most likely to happen when the sun is at its peak, explains Ivy Lee, MD, a board-certified dermatologist in Pasadena, California. “Be sure to seek shade and avoid the peak hours of sunlight from 10 a.m. to 4 p.m.,” says Dr. Lee.
If you are out during these times, make sure you’re diligent about applying the right amount of broad-spectrum sunscreen every two hours. And if you often have to spend long stretches outside during this window, consider investing in sun-protective UPF clothing. Remember that even if you don’t get a sunburn, you can still experience sun damage.
“There's no such thing as a safe tan,” Dr. Lee previously told Well+Good. "Any time we are getting exposed to ultraviolet rays from being outdoors, we're accumulating DNA damage in our skin cells—whether you're laying out on the beach or running errands and picking up a little bit of sun exposure there. The DNA damage from all that sun exposure is cumulative, meaning that it builds up over time, and it's what leads to the signs of premature aging that we see with wrinkles, dark spots, and leathery skin. It's also what leads to skin cancer."
How to apply sunscreen the right way:
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