30 is the minimum SPF you should use. Look for water resistance and broad spectrum formula.
Sunscreen Rule #2:
Apply sunscreen 20 minutes before you go out in the sun.
Sunscreen Rule #3:
Use about 1 ounce of sunscreen to coat your body to provide the SPF listed on the label. If you're using lotion, that's about the amount that would fill a shot glass. If you're using a spray, that's 30 to 90 seconds of spraying--enough to create a visibly glossy sheen as it goes on.
Sunscreen Rule #4:
The number of hours you can go without reapplying sunscreen IF you're not sweating or in the water is --2 hours.
A Sunscreen Pill?
British scientists are working to create sunscreen in pill form, after discovering that coral in the Great Barrier Reef creates its own UV protection by consuming a compound in algae. Human testing hasn't begun yet, but someday we may be able to swallow our sunscreen.
Courtesy of Prevention Magazine.
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