Is it time for your to start preventing premature aging, or do you need to kick it up a notch and start reversing signs of aging? Here's a simple guide that will take your through your 20's, 30's, 40's and beyond. 20's Prevention- Always wear sunscreen with an SPF of 15-30 whenever you're in the sun. And remember to reapply every two hours if you are in the sun for an extended period. Sunscreen will start breaking down and become ineffective after that. I love the Photo-Age E