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I’m a doctor. Here’s why I wear sunblock indoors.

 What to know

Experts recommend wearing sunscreen indoors due to UVA exposure from windows, which can cause skin aging and cancer. Studies show UVA rays penetrate glass, affecting skin even indoors. Mineral sunscreens with iron oxide are advised for better protection against visible light, especially for darker skin tones. SPF 30 offers substantial UVB protection, but broad-spectrum sunscreens are essential for UVA defense.

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