What does SPF mean on sunscreen?
SPF stands for Sun Protection Factor, and it measures the level of protection a sunscreen offers against ultraviolet (UV) rays. Specifically, it indicates how long you can stay in the sun without getting sunburned compared to not wearing any sunscreen. For example, if you normally burn after 10 minutes in the sun, an SPF 30 sunscreen would allow you to stay out for about 300 minutes without burning, assuming proper application.
Key points:
- SPF measures protection against UV rays.
- Higher SPF numbers indicate more protection.
- Sunscreen should be applied generously and evenly.
- Reapplication is necessary, especially after swimming or sweating.
This text has been fact-checked for accuracy by medino's clinical team.