What does sunscreen do exactly???

Do you still tan when using sunscreen and what the SPF number mean?


Also why do you tan during the summer and after the winter you are so pale?
What does sunscreen do exactly???
Sunscreen forms a barrier between your skin and the UV rays of the sun, the higher the SPF the more protection the sunscreen offers. You can still tan if you use a SPF15 but if you use for example an SPF40 you will have total protection. Many facial moisturisers now have SPF15 as standard, this offers a light daily protection for your skin.





EDIT Being exposed to UV rays in Summer increases the melanin in your skin and brings it to the surface causing a light pigmentation or %26quot;tan%26quot;. If the sun exposure is decreased the tan fades and your skin returns to it%26#039;s natural level of pigmentation. Obviously in Winter there is less sun so that%26#039;s why we%26#039;re paler in Winter.
What does sunscreen do exactly???
Sunscreen is designed to stop your skin from absorbing ultraviolet rays (UV). There are two types of ultraviolet rays. These are ultraviolet A %26amp; B. Most sunscreen protects you from ultraviolet A unless it says otherwise.





On the bottle of sunscreen you will notice an SPF number. This stands for sun protection factor. The higher the number the more protection you have from the sun. If you are going to be out in the sun the recommended MINIMUM is 30.





The lighter your skin is the higher you should need.
Reply:it blocks the sun%26#039;s UVA and UVB rays which are skin damaging---dont know exactly what spf means but it indicates the strenght of the protection from the suns rays---the higher the number the more protection you have and you can still get a tan---in summer u get more sun rays and also you are outdoors more.