system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If 50+ SPF is best, why are there sunscreens on the market with much less protection?
gpt
The SPF rating tells you how much UV light the product blocks. Higher numbers means it blocks more UV light. UV light is also what makes skin get tan. So, some people use lower SPF sunscreens to both protect their skin somewhat and still get a tan.