Rhonda Patrick· PhD
UVB barely gets through the atmosphere down to us, and it does hit us when we're outside. And the sun's got to be pretty high up in the sky. You go behind a piece of glass, there's almost no UVB at all, the only thing that's coming through is UVA, which is, you know, nasty ultraviolet radiation that makes your furniture, you know, fade, your carpet fade, and it gives you aging wrinkles on your skin.