What Does the SPF Number Mean? - Verywell Health
Nov 14, 2025 · SPF stands for Sun Protection Factor. The SPF number indicates the level of protection against ultraviolet (UV) B rays. Sunscreens with a higher SPF offer greater …
Understanding SPF: What Do Those Numbers Actually Mean?
May 14, 2025 · Learn what SPF means, how it protects your skin, and how to choose the right sunscreen for full sun protection.
Sunscreen: SPF explained | Columbia Memorial Hospital
Jul 25, 2025 · The abbreviation SPF on a sunscreen label stands for sun protection factor. The SPF number indicates the level of protection a sunscreen provides against ultraviolet B (UVB) …
Sun Protection Factor (SPF) | FDA
SPF is a measure of how much solar energy (UV radiation) is required to produce sunburn on protected skin (i.e., in the presence of sunscreen) relative to the amount of solar energy …
SPF 101: What It Means, How to Use It, and Choosing the Right
May 1, 2025 · We all know the importance of SPF, but what does SPF actually mean? Inside, dermatologists define what SPF means, when and how to use it, and formula tips.
SPF Meaning: How Sunscreen Actually Works | The Well by …
SPF stands for “sun protection factor,” and represents how well a specific sunscreen protects against the sun’s harmful ultraviolet B (UVB) rays, which, according to the American Cancer …
What is SPF? How Long Does SPF 50/30 Last? | Coppertone
SPF stands for Sun Protection Factor and is a measure of how well a sunscreen protects your skin from UVB rays and sunburn. The higher the SPF, the longer the protection will last.
Sunscreen: SPF explained | Pella Regional Health Center
Jul 25, 2025 · The abbreviation SPF on a sunscreen label stands for sun protection factor. The SPF number indicates the level of protection a sunscreen provides against ultraviolet B (UVB) …
SPF Levels, Explained: The Only Guide You’ll Ever Need
May 21, 2025 · SPF stands for Sun Protection Factor, and it’s a way of measuring how well a sunscreen protects your skin from UVB rays (aka the rays that cause sunburn). But here's the …
What Does “SPF” Mean? | Britannica
The SPF on sunscreen stands for sun protection factor, a relative measurement for the amount of time the sunscreen will protect you from ultraviolet (UV) rays. UVB rays primarily affect the …