As summer has arrived, more and more people want to enjoy the sun and get a nice tan. However, it might not be that simple. Many of us have been wondering which is the best SPF for a day spent in the sun.
To begin with, SPF comes from sun protection factor. Experts underline that mixing sunscreens is a wrong choice, so we should go for a healthy product and stick with it. We all know that SPF can be as high as 70.
According to Shari Lipner, a dermatologist from Weill Cornell Medicine, SPF measures how much exposure to the ultraviolet rays is needed in order to get your skin burnt. Based on the latest research, if your skin starts getting red after 20 minutes of sun exposure, then SPF 15 sunscreen will provide you a 15 times longer period in the sun.
It means that you can stay around five hours in the sun without getting your skin burnt. However, experts recommend people to reapply the sunscreen every two hours, after swimming or excessive sweating. Most of us usually think that if we get a sunscreen with a higher SPF, then we will be much more protected from the UV rays.
Nevertheless, recent research has shown that SPF 15 blocks around 93 percent of UVB rays, whereas SPF 30 blocks only 97 percent. Therefore, even if you double it, the level of protection will not double as well.
In addition to this, SPF 50 offers 98 percent blocking against UVB rays, whereas SPF 70 blocks almost 99 percent of them. In other words, our best bet would be to go with SPF 30 sunscreen. However, scientists added that people with a much more sensitive skin could choose a higher protection level just in case.
It is also worth mentioning that people usually do not apply enough sunscreen, or they do not apply it correctly. Another important aspect is that we should be aware not just to the UVB rays but also to the UVA rays.
It was recently discovered that UVA rays, the ones that usually give a tan, are more common and more likely to penetrate the skin even deeper. Therefore, besides the correct SPF, experts advise consumers to look for a product that has the broad spectrum label on it.