SPF is one of the most familiar words on a sunscreen label. You see SPF 15, SPF 30, SPF 50, and sometimes higher. But SPF does not tell the whole story.
That is why broad-spectrum sunscreen matters. Broad-spectrum products are tested for UVA protection as well as UVB protection.
UVA and UVB in Simple Terms
UVB
Strongly linked with sunburn. SPF measures protection against this type of UV radiation.
UVA
Penetrates deeper into the skin and contributes to long-term skin damage and early skin aging.
Both UVA and UVB matter for skin health. Broad-spectrum sunscreen is designed to address both.
The American Academy of Dermatology recommends choosing a broad-spectrum, water-resistant sunscreen with SPF 30 or higher for all skin exposed when outside.
What to Look For on the Label
When choosing sunscreen, look for:
- Broad-spectrum
- SPF 30 or higher
- Water resistance (especially when swimming or sweating)
- Clear reapplication instructions
Also remember that sunscreen works best as one layer of protection, not the only layer.
Key Takeaway
SPF is important, but SPF alone is not the full protection picture. Look for broad-spectrum sunscreen to help protect against both UVA and UVB.
UVTREK reminder: Choose broad-spectrum sunscreen, then use it correctly.
FDA: sunscreen labeling and SPF testing guidance.
American Academy of Dermatology: sunscreen label guidance and SPF 30+ recommendations.