What do SPF numbers mean? When it comes to SPF 15 vs. SPF 100, there’s a big difference! Here, we break it all down for you – and tell you why the only ones you should focus on are between 30 and 50.
Many of us have a pretty general understanding of what SPF numbers mean. For example, common sense tells you that SPF 15 is going to provide less protection from the sun than SPF 30. But what exactly do these numbers indicate?
With the help of Chris G. Adigun, MD, a board-certified dermatologist in Chapel Hill, we’re going to do a deep dive into the world of SPF to learn about where those numbers come from and how they’re configured before being slapped onto a label. We’re also going to address why you should always use SPF 30 to 50 and why a super high SPF can be a bad thing.