The use of sunscreen will increase the maximum UV-values and exposure time before sunburns occur. The amount of extra protection depends on the Sun Protection Factor (SPF). Always read the manufacturer’s recommendations on use, amount needed and SPF. Observe that an SPF of for example 10 doesn’t automatically mean you can stay out in the sun 10 times longer that without sunscreen. Sunscreen may also have different levels of protection for UV-A and UV-B. We recommend using skin friendly sunscreens with both UV-A and UV-B protection.
Some sunscreen products block UV-B but not UVA-A. UV-B is the trigger that causes the body to produce melanin, giving skin its brown colour and protects it by actually giving you thicker, tougher skin that absorbs UV-A radiation. By blocking UV-B only, the body’s own protection remains inactive, while the UV-A dose is much higher than it would normally be.
We also often use less sunscreen lotion than the manufacturer recommends in order to get the stated Sun Protection Factor, essentially reducing the effectiveness of the sunscreen.
SunSense technology is the sensible way to monitor your UV-exposure. If you need to use sunscreen, make sure it is made from natural ingredients and blocks both UV-A and UV-B.