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Sunscreens work by absorbing, reflecting or scattering ultraviolet light, thereby reducing the amount that reaches the skin. The sun protection factor (SPF) of a sunscreen tells you how much longer you can stay in the sun without burning if you apply the sunscreen. For example, if your child would burn after 20 minutes of sun exposure, applying a sunscreen with a SPF of 15 gives her 15 times the protection. In this example, the child will be protected for up to 5 hours: 20 minutes x 15 SPF = 300 minutes (5 hours).

The FDA recommends that kids use a SPF of 15 or higher to prevent both sunburn and tanning. A SPF of 15 will block about 94 percent of UVB rays and a SPF of 30 will block about 97 percent of UVB. But keep in mind that these SPF ratings do not necessarily mean your child will be protected against the UVA rays that cause cancer and skin damage. SPFs only give a rating of sunburn protection. Your sunscreen should include ingredients that protect against both UVA and UVB rays.

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โˆ™ 2010-04-05 22:17:53
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Q: How does sunscreen work?
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Why use natural sunscreen on your body rather than regular sunscreen?

Well, natural sunscreen has many useful benefits that normal sunscreen does not have. A natural sunscreen for example can provide much vitamins and mineral that are beneficial for your skin in many ways. The regular sunscreen on the other hand can contain many ineffective chemicals and is not as effective as a natural sunscreen.

Does sunscreen work?

yes because it helps you be protected of the sun

How do you get an even complection?

i think use of sunscreen is very necessary but sunscreens also work for 3 or 4 hr only we need a sunscreen which is waterproof and work for more time if u get so plz tell me

Do perfumes have sunscreen?

No, perfumes do not have sunscreen.

What part of speech is sunscreen?

Sunscreen is a noun.

Do you need sunscreen?

Yes, you need sunscreen because if you don'y put it on, you will get sunburn. If you do put on sunscreen, you will NOT get sunburn.

What do you use to keep safe in the sun?

sunscreen or sun cream or sitting in a shady spot

What should lifeguards wear to work?

A bathing suit, water shorts, sunglasses, and lots of sunscreen

Is sunscreen a pure substance or a mixture?

Yes, EXTRASHADE sunscreen is very helpful for men, women. It protects your beautiful Rich complexions from the harmful UV rays of the sun.

How do you day ''sunscreen'' in French?

Sunscreen is "écran solaire" or "crème solaire" in French.

How do sunglasses block glare?

they put on sunscreen they put on sunscreen

Is zinc used in sunscreen?

it's in some types of sunscreen

What is the translation of 'sunscreen' into Welsh?

Eli haul

How can a vampire become immune to the sun?

Sunscreen. Lots of sunscreen.

Can you still get tan with sunscreen on?

You can still get a tan when wearing sunscreen. Sunscreen protects the skin from the harmful UV rays of the sun.

What is the difference between childrens sunscreen, and regular sunscreen?

Yes, you should only use sunscreen that is made just for kids. Kids sunscreen is free from chemicals that can harm their skin and burn their eyes.

When exercising outside how much sunscreen do you need to apply?

A lot of sunscreen

What chemical formula is sunscreen?

Sunscreen is a complex mixture not an unique substance.

Can you get a suntan with sunscreen on?

Yes. That is because sunscreen does not block all radiation. The higher the SPF of the sunscreen, the more radiation it blocks, and the lighter the tan.

When should you apply sunscreen?

We should apply sunscreen even if it is nit sunny.

How long do you have to wait to get in the pool after you put on sunscreen?

As long as it takes for the sunscreen to dry.

What is spf on sunscreen?

On sunscreen bottles, SPF stands for 'Sun Protection Factor'.

Does sunscreen get old?

yes sunscreen has a shelf life of approx one year