I'd like to share something that surprised me while studying skin.

If you don't apply sunscreen, your skin is exposed to UV rays coming through the window even indoors. I used to think I didn't need to wear sunscreen on days I stayed home, but that was a complete misconception. I heard that spending a lot of time near a window, in particular, can lead to pigmentation and skin aging.

I also learned for the first time that sunscreen needs to be applied 30 minutes before going out to be properly effective. It used to be my habit to apply it right before leaving, but I think I need to change that as well. The more I study skincare, the more I realize how many things I've been misunderstanding all this time. I'm in the process of correcting them one by one.