Experts Say You Need to Wear Sunscreen Indoors. Here’s Why.


Serious question — do you need to wear sunscreen indoors? The short answer is yes.

Sunscreen — the most controversial skincare product. We call it “controversial” not because it is essentially bad or harmful to human life and skin, but because there are so many myths and false information about it on the internet that people are so afraid to buy and use it. Ask any dermatologist and they will tell you that number one cause of wrinkles, skin issues and skin cancer is the sun. And therefore, SPF is a must, no matter the weather, season, or temperature.


Why you should wear sunscreen indoors?

While it is important to wear sunscreen outdoors, it is equally important to wear it indoors. Why? Because UV rays can penetrate through glass windows. To understand this further, let’s learn what UV rays are.

UV or Ultraviolet radiation are invisible rays that are part of the energy that comes from the sun. These rays are primarily made up of two types, called UVA and UVB. UVA has a longer wavelength, which means that it can penetrate the skin deeper. Let’s say the A in UVA stands for ageing, because when it penetrates into the skin, it damages the collagen and elastin and causes premature ageing. UVB, on the other hand has a shorter wavelength, which means that it can damage the outer layers of the skin. The B in UVB can be associated with burning, because it causes redness, sunburns, infections and even blisters.


While glass windows filter out UVB rays, UVA rays can still penetrate through it and cause skin damage. Which is why, it is advised to wear SPF whether you are at home, in your car or of course outside.


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