What Does the SPF Number Mean? - Verywell Health
2023年10月10日 · What Does the SPF Number Mean? SPF stands for Sun Protection Factor. The SPF number indicates the level of protection against ultraviolet (UV) B rays. Sunscreens …
Sun Protection Factor (SPF) | FDA - U.S. Food and Drug Administration
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
2023年5月26日 · SPF stands for sun protection factor, "which is a measure of of how long a sunscreen will protect you from ultraviolet rays," says Guanche. “For example, using SPF 30 …
What does SPF mean? | MD Anderson Cancer Center
2021年5月28日 · A sunscreen’s SPF is a measure of how well it protects you from getting a sunburn. But a higher SPF number doesn’t necessarily mean better protection from sun …
What Does SPF Mean? - Consumer Reports
2024年6月15日 · SPF—or sun protection factor—is a measure of how well a sunscreen guards against sunburn. The SPF number is usually explained as the amount of time it takes for skin …
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. While …
How to decode sunscreen labels - American Academy of Dermatology
FDA meaning: How well a sunscreen protects you from sunburn. To simplify things, you may want to think of the sun protection factor (SPF) as the " sunburn protection factor." Another …
What Is SPF: How It Works, Uses, Best SPF Level for You, and …
2020年1月10日 · Sun protection factor (SPF) indicates how long sunscreen will protect your skin from sunburn. So, in theory, if your skin would usually burn after 10 minutes, using a sufficient …
How to Choose the Best Sunscreen: SPF, Ingredients & Skin Type …
2025年3月24日 · Higher SPF Blocks More UVB Rays: SPF 30 allows 3% of UVB rays through, while SPF 50 allows 2%, meaning SPF 50 offers stronger protection but not significantly …