system
Given the following post, respond as if you're commenting on Reddit:
human
How does sunscreen stop you from getting burnt?

Is there something in sunscreen that stops your skin from burning? How is it different from other creams etc?
gpt
Yeah it contains one or more ingredients that absorb or reflect UV radiation very effectively. So while sunscreen usually doesn't change how you look in the visible spectrum, at least not much, if you had UV vision it would look like being smeared in paint.

The active ingredients can vary. Generally organic compounds tend to absorb the UV, while inorganic compounds like titanium dioxide tend to reflect and scatter it away.