what does spf stand for
SPF stands for Sun Protection Factor.
Understanding SPF
SPF stands for Sun Protection Factor.
It measures the level of protection against UVB rays.
How SPF Works
SPF indicates how long you can stay in the sun without burning.
For example, SPF 30 means 30 times longer protection.
Choosing the Right SPF
Select SPF based on skin type and sun exposure.
Higher SPF offers more protection but not linear.
- Fair skin: SPF 30+
- Medium skin: SPF 15-30
- Dark skin: SPF 15
Reapplication is Key
Reapply sunscreen every two hours.
More frequent application is needed after swimming.
Limitations of SPF
SPF does not measure UVA protection.
Broad-spectrum products protect against both UVB and UVA.