SPF 100 is better than SPF 30, right? The answer might surprise you.
Sunscreen labels are definitely confusing. It is only logical to think that the higher SPF the more protected your skin will be, but the answer is a little more complicated than you think.
Sunscreen: The higher SPF is it really the better?
The sun protection factor measures how well a sunscreen protects the skin against UVB rays, which are the burning rays that can penetrate the skin and are responsible for sunburn. But the claim that SPF 100 means that you are totally protected from the sun is not true. The difference between SPF 30 and 100 is only about 2%.
People only apply half of the product they should apply and it gets diluted. So, if you use an SPF 30 sunscreen, you might be getting only 15. This is why a higher SPF is recommended, it is actually more effective using an SPF 30 sunscreen and reapplying it consistently than choosing an SPF 100 that you only apply once a day.
The key is to apply a higher SPF if you are going to be outside for a long period of time, and if you are using a lower SPF, make sure to really every two hours or so.