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 with a higher SPF offer greater protection from the sun.
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 required to...
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 means it will take 30 times as long for your skin to burn than it does with no sunscreen applied.
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 Society, can cause skin cancer, sunburn, and premature aging of the skin, while also weakening the immune system.
'What SPF Do I Need?' Here's a Dermatologist's Reliable Method …
2023年4月6日 · SPF stands for “sun protection factor”—but specifically, says Megan Rogge, MD, a board-certified dermatologist and assistant professor of dermatology at UTHealth Houston, SPF is a marker of protection against the sun’s UVB rays.
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 damage. In fact, choosing a sunscreen based only on a high …
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 higher SPFs block more of the sun’s UVB rays, no sunscreen can block 100% of …
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 amount of SPF 15 sunscreen would protect you from …
What is SPF? Best SPF Sunscreens & Types of SPF Explained
SPF stands for Sun Protection Factor, a measure of how well a sunscreen protects the skin from ultraviolet (UV) radiation.
Understanding SPF: What the Numbers Really Mean - Zicail
2024年12月10日 · Learn about SPF, how it works, and what those numbers mean for your sun protection. Discover tips for choosing the right sunscreen for your skin. Let’s dive into SPF, or Sun Protection Factor, a crucial element of your skincare routine.