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How much do you know about sun protection?

How often should you re-apply?

The rays tempt and tantalize as Breighana Knittel and her daughters hit the beach,

but this mom is well aware of the danger.

One in 5 Americans will develop skin cancer in their lifetime.

"Skin cancer runs in my family," Knittel said, "and I don't want to take that risk, especially with my kids."_

When Bobby Jackson was growing up, he didn't know about sun protection.

His skin now shows the consequences.

"I'm not exaggerating, it's probably 40 or 50 places over the years that have either burned, frozen or cut off," he said.

Dermatologist Dr. Sean Branch says there are still a lot of myths about the sun and your skin.

The biggest one: a "base tan" will protect you from burning later.

"In order for your body to produce a tan to begin with, there has to be DNA damage at the cellular level," Branch said.

So sun protection is needed all the time.

How often should you re-apply?

Every 2 hours.

Is a higher SPF number better?

The higher the better. Make sure it is "broad spectrum" to protect against UVA and UVB rays.

Branch said some people are concerned about chemicals in sunscreens, like oxy-benzone. If you want to avoid them, there are lots of mineral blockers like zinc and titanium dioxide.

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