What Does SPF Mean?

Sun Protection Factor, or SPF, is a number that indicates the level of protection of sunburn by using sunscreen.

Function

SPF indicates how long you can be exposed to the sun if wearing sunscreen. However, SPF does not increase how long you can be in the sun. Dermatologists recommend that you apply about 1 oz., 30 minutes before going outside.

Significance

SPF in sunscreen can help decrease the risk of skin cancer.

Types

SPF numbers range from 2 to 50. The higher the number indicates the greater the sunburn protection. Dermatologists recommend an SPF of at least 15. For children, the recommended SPF minimum is 30.

Misconceptions

It's a common assumption that how long a sunscreen is effective can be figured out by multiplying the SPF with how long it takes a person to achieve a sunburn without using sunscreen. However, sun exposure is dependent on more than the length of time in the sun.

Considerations

Other factors to consider that can affect sun exposure are weather conditions, the time of day and location.

References

• American Academy of Dermatology
• MedicineNet
• Sun Safey Alliance

Who Can HelpSponsored

• Best Kept Secrect in SkinCare? Try it Free!