Broad spectrum
Also called: Broad-spectrum sunscreen
Broad spectrum means a sunscreen has tested protection across both UVA and UVB wavelengths. It is the label phrase that tells you SPF is not the only protection signal.
At a glance
- Broad spectrum covers both UVA and UVB, not UVB alone.
- In the United States, the claim is tied to FDA broad-spectrum testing.
- SPF still matters, but broad spectrum tells you the coverage is wider.
On this page
The short answer
Broad spectrum means the sunscreen is not only about UVB sunburn protection. The FDA describes the Broad Spectrum Test as an in vitro measurement of protection against both UVA and UVB radiation[1].
That matters because SPF alone can make a sunscreen sound more complete than it is.
Why the phrase matters
UVB is closely tied to sunburn. UVA is more connected with tanning, pigmentation, and photoageing, although both forms of UV can damage skin.
The FDA tells consumers that broad-spectrum sunscreens help protect against both forms of UV radiation, while SPF values primarily indicate UVB protection[2]. In plain English: SPF is the number, broad spectrum is the coverage clue.
Mads's practical read
If you only remember one label rule, make it this: choose a sunscreen that says broad spectrum and that you can stand to use every day. The best sunscreen is rarely the most impressive one on paper. It is the one you apply enough of, often enough.
Keep reading
Common questions
Is broad spectrum better than SPF alone?
Yes, if you care about UVA as well as UVB. SPF mainly describes sunburn protection, while broad spectrum tells you the sunscreen covers both UVA and UVB.
Can a low-SPF sunscreen be broad spectrum?
A sunscreen can be broad spectrum at different SPF levels, but for daily exposed skin many dermatology groups recommend SPF 30 or higher.
Citations
- FDA: Labeling and Effectiveness Testing: Sunscreen Drug Products - U.S. Food and Drug Administration
- FDA: Sunscreen: How to Help Protect Your Skin from the Sun - U.S. Food and Drug Administration