When preserving the integrity of your skin and reducing the incidence of wrinkles, sunscreen is definitely your go-to-product. To really reap the benefits of an SPF, you have to wear one with at least a sun protection factor of 30 on a daily basis – not just when you’re at the pool or beach. A good SPF will block both UVA (those are the rays that age the skin) and UVB rays for full protection.
NewBeauty Magazine - Fall/Winter 2013 Issue
Jan Marini C-ESTA is the one that finally worked for me. It contains a form of Vitamin C that is both stable and easily absorbed, which means a faster path to rejuvenated skin. Smells a little like a piña colada, but that's a small price to pay. Use twice a day before moisturizer for maximum results
HarpersBazaar.com - May 2013