advertisement
12 January 2009

What is SPF?

Sunscreens block or absorb ultraviolet light, but they must be chosen and applied correctly. To understand them properly, you need to know what the term SPF means.

0

Sunscreens block or absorb ultraviolet light, but they must be chosen and applied correctly. To understand them properly, you need to know what the term SPF stands for and what it means.

All sunscreens carry a sun protection factor, or SPF. The SPF is essentially a multiplying factor. If you would normally be safe in the sun for 10 minutes and you apply an SPF 10 sunscreen, you can stay in the sun safely for 100 minutes.

For the sunscreen to be effective, you have to apply plenty and it has to stay on. You should apply it about half an hour before going out in the sun (or the water), to give it time to bind to your skin.

Remember that only sunscreens with an SPF higher than 15 will protect you from both UVA and UVB rays.

 
NEXT ON HEALTH24X
advertisement

Read Health24’s Comments Policy

Comment on this story
0 comments
Comments have been closed for this article.

Live healthier

The debate continues »

Working out in the concrete jungle 7 top butt exercises for guys 10 things pole dancing can do for you

The running vs. walking debate

There are many different theories when it comes to the running vs. walking for health and weight loss.

Veganism a crime? »

Running the Comrades Marathon on a vegan diet Are vegans unnatural beasts? Can a vegan be really healthy?

Should it be a crime to raise a baby on vegan food?

After a number of cases of malnourishment in Italy, it may become a crime to feed children under 16 a vegan diet.