Warmer weather means spending more time outdoors. While lounging by the pool may still be a fantasy for many of us, it’s not too soon to get our skin ready for the upcoming onslaught of ultraviolet (UV) radiation.

We need sunlight every day to help synthesize vitamin D. But there are downsides to our spending too long in the sun. Wrinkles spring to mind — plus age spots. And don’t forget the link between UV radiation and skin cancer.

Too much sunlight causes problems because it triggers the production of free radicals that damage DNA and destroy cells. The two major sources of skin trauma from the sun are UVA and UVB.

Although only 0.5 percent of UVB rays reach the earth, we can blame them for sunburn, inflamed skin, and more — they’re the most carcinogenic constituent of sunlight. UVA, on the other hand, contributes to wrinkling and skin aging year-round, even when we’re in our cars or curled up next to a picture window.

There are times — when you’re at the pool, the beach, or on the boat — that topical protection is important. But not all sunscreen formulations are created equal.

Padimate-O, or octyl dimethyl PABA, an ingredient in some commercial sunscreens, may mutate into toxic substances with UVA radiation. However, the U.S. Food and Drug Administration continues to allow its use.

Researchers are working to develop a safer form of this once-popular substance. Always look for natural ingredients on the ingredients panel of these (and other) skin care products.

Look for products that protect against both UVA and UVB. Remember that even the best sunscreen doesn’t allow you unlimited exposure to the sun.

For long-term sun protection, wear long-sleeved cotton shirts and pants outdoors, and splurge on a stylish hat. [source: Taste for Life]