What Is SPF In Sunscreen? Everything To Know From SPF 50 To SPF 15

By: Akshita Gupta  For: www.thechannel46.com Date: 2nd March 2023

1. SPF stands for Sun Protection Factor and it measures the amount of UVB radiation that is blocked by the sunscreen. UVB radiation is responsible for sunburns and can contribute to skin cancer.

2. The number that follows SPF represents the level of protection that the sunscreen provides. For example, SPF 50 blocks 98% of UVB rays, while SPF 15 blocks 93% of UVB rays.

3. Experts recommend using a sunscreen with at least SPF 30, which blocks 97% of UVB rays. However, it's important to note that no sunscreen can block 100% of UVB rays.

4. It's also important to choose a broad-spectrum sunscreen, which protects against both UVB and UVA radiation. UVA radiation is responsible for premature aging and can also contribute to skin cancer.

5. The amount of sunscreen that you apply is also important. Experts recommend using about 1 ounce (or a shot glass full) of sunscreen for your entire body, and applying it 15 minutes before going outside.

6. Lastly, it's important to reapply sunscreen every 2 hours, or more often if you're swimming or sweating. Sunscreen can wear off or become less effective over time, so it's important to keep reapplying to ensure that you're getting the maximum protection.