Do I need sunscreen if I work indoors?

Yes, if you sit near windows. UVA rays (which cause aging and skin cancer) penetrate glass. Standard office windows block UVB but not UVA. If your desk is near a window or you drive regularly, you are getting significant UVA exposure. Apply a lightweight SPF 30 moisturizer in the morning many daily moisturizers now include SPF, making it effortless to add to your routine.