What is SPF?
SPF stands for "Sun Protection Factor". It measures the effectiveness
of sunscreens and indicates how long you can safely stay in the sun
before you burn when using the product compared to not using any sunscreen
at all - if you use the product correctly.
For example, if a sunscreen is labeled 15, you can stay in the sun
without sun burning 15 times longer than if you used no sunscreen
at all. The actual effectiveness will vary from person to person.
SPF refers only to UV-B rays (which are mainly responsible for sunburn).
How high of a SPF do I need for daily use?
Dermatologists recommend a sunscreen of at least SPF 15 for anyone
who is going to be out in the sun for longer than 10 minutes, regardless
of your skin type.
When should I use a higher Once A Day SPF?
Most dermatologists agree that higher SPF products (SPF 30 or 45)
should be used by those who need more protection: people with extremely
fair, freckled skin or those who have a family history of skin cancer.
Other good candidates for higher SPF are those taking medications
that may make them extra sensitive to the sun.
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