SPF
Also known as sun protection factor, broad spectrum, sunscreen
What is SPF?
SPF stands for sun protection factor. It measures how well a sunscreen blocks UVB, the rays that burn your skin. SPF 30 blocks about 97% of UVB and SPF 50 blocks about 98%, and the words broad spectrum on the label mean it also covers UVA, the rays that age your skin.
Best forSun damage
Skin cancer prevention
Dark spots
Premature aging
SPF products
Shop all 288
EltaMD
EltaMD UV Restore Broad-Spectrum SPF 40 Tinted
$25.50
EltaMD
EltaMD UV Clear Untinted Broad-Spectrum SPF 46
$23.50
Colorescience
Colorescience Sunforgettable Total Protection Face Shield Flex SPF 50
$58.00
Revision
Revision Skincare Intellishade Original SPF 45 Tinted Moisturizer
$89.00
Pairs well with
- Vitamin C
- Antioxidants
- Niacinamide
- Iron oxides
Use with caution
- Applying too little (use a quarter teaspoon for your face)
- Skipping reapplication every two hours
- Relying on the SPF in makeup alone
- Expired sunscreen
SPF FAQs
Use SPF 30 or higher with broad spectrum on the label. Go to SPF 50 for long days outdoors.
SPF 50 blocks about 98% of UVB and SPF 30 blocks about 97%. How much you apply makes a bigger difference than the number.
Reapply every two hours outdoors, and right after swimming or sweating.
You need it on cloudy days, since up to 80% of UV passes through clouds. Indoors, wear it if you sit near a window.
Related reading
This content on this page is for general information only and is not medical advice. Always speak to a dermatologist before starting a new skincare routine.
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