Issue 03 · Summer · Routines
Do I need sunscreen if I'm indoors all day?
Glass, screens, and the part of the spectrum that reaches your desk.
3 min readGlass Skin & Glow
Yes, if you sit near a window. Standard glass blocks UVB but lets most UVA through, and UVA is the wavelength that drives pigment and collagen loss. Screens are irrelevant by comparison. The visible light they emit is a rounding error next to a window at midday.
The window problem
A desk beside glass can deliver meaningful UVA over an eight-hour day. If your pigmentation is worse on one side of the face, look at where you sit in the car and at work before blaming your routine.
What to use when nobody sees you
The best indoor sunscreen is the one you will reapply without resentment. A light fluid at 8am and again after lunch beats a heavy cream applied once and abandoned by Wednesday.
General information, not medical advice. What applies to your skin is decided by a doctor after an assessment.
