I hear this from clients constantly: 'I work from home, so I don't really need SPF on days I'm indoors, right?' I understand the logic β if you're not in direct sunlight, it seems like sun protection shouldn't matter. But this reasoning misses a critical distinction between the two types of UV radiation and how they reach your skin.
UVA vs. UVB: The Key Difference
UVB rays are the ones that cause sunburns β they're strongest in direct midday sun and are largely blocked by glass. UVA rays are a different story entirely. They penetrate clouds, penetrate glass, and maintain consistent intensity throughout the day and across seasons. UVA rays don't cause burning, which makes them invisible in terms of immediate feedback β but they penetrate deeply into the dermis, directly damaging collagen and elastin, and driving the processes that cause premature aging, hyperpigmentation, and increased skin cancer risk.
If you sit near a window at home or in the office, you are receiving UVA exposure. Every day. Whether it's cloudy or clear.
What About Blue Light?
Blue light β emitted by screens, LED lighting, and the sun β is a growing area of research in dermatology. Current evidence suggests that prolonged blue light exposure can generate free radicals in the skin, contributing to oxidative stress and potentially worsening hyperpigmentation, particularly in deeper skin tones. While the research is still evolving, the precautionary case for daily antioxidant use and broad-spectrum protection is strong.
The Practical Answer
Yes, you need SPF indoors if you spend any meaningful time near windows or screens. The good news is that a lightweight daily SPF β applied as part of your morning routine β handles both concerns without any additional effort. You don't need a heavy formula; you need a good one that you'll actually use consistently.
Our Sun Ritual SPF 40 is specifically designed to be so lightweight and skin-flattering that daily indoor use feels effortless β not like an extra step.
Daily SPF is your most powerful long-term anti-aging investment. Shop the Sun Ritual SPF 40 here.