What you need to know about Sunscreen (Part 3)
Sunscreen explained - Let us answer some of the most common myths about Sunscreen
1.If it's cold or cloudy outside, you don't need sunscreen.
This is not true. Up to 40 percent of the sun's ultraviolet radiation reaches the earth on a completely cloudy day. This misperception often leads to the most serious sunburns, because people spend all day outdoors with no protection from the sun.
2. Higher SPF = better protection
This is not true. SPF is a measure of a sunscreen's ability to prevent UVB from damaging the skin. Here's how it works: If it takes 20 minutes for your unprotected skin to start turning red, using an SPF 15 sunscreen theoretically prevents reddening 15 times longer — about five hours. As you can see from the graph below, from SPF15 to SPF50, there is only a 5% change in the protection level.
3. Sunscreen can prevent 100% of skin damage caused by UV rays.
This is also not true, because no sunscreen can block all UV rays. Therefore, it's necessary for you to take other precautions, such as wearing broad-brim hats, UV-protected sunglasses and long sleeves when spending time under the sun. Always try to stay under the shade, and avoid going out in the sun from 12pm - 3pm.