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Why you need to use sunscreen indoors as well as outdoors

While UVB rays are unable to penetrate glass, UVA rays pass through glass. So even if you’re indoors, you are exposed to UVA rays when near windows. Also, remember that UVA radiation is constant throughout the day and year around. So even on a cloudy day, there will be UVA radiation coming through your glass windows.

In addition to UV radiation, new research is pointing to parts of visible light as a cause of free radical damage and skin ageing. Blue light is a high-energy light close to the UV spectrum but in the visible spectrum of light. Also referred to as high energy visible (HEV) light, it is emitted by laptops, televisions, and mobile phone screens.

So what kind of sunscreen should you choose for indoor use?
As mentioned before, UVB radiation is not a concern indoors. So SPF is not important. What you want is high UVA protection, so look for a high PA rating. Physical sunscreens have been shown to be much more effective at blocking UVA and visible light. If you want to take it a step further, a physical sunscreen tinted with iron oxides might offer the best combination. So whether you’re working from home or heading to the office, don’t neglect your sunscreen!

To know more about the basics of sun protection, read our blogs on demystifying sunlight, and simplifying SPF truths!

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