This is an excellent question that I have wondered myself.
I have used Prevention magazine for this purpose and this is how I found some good products. Each year they ask women to try various products and also have a team of dermatologists check the women's skin to choose the "best" anti-aging products. Here is information on Defy Your Age Beauty Awards for 2011.
From past recommendations I have tried products such as Skin Effects Cell 2 Cell cream and StriVectin-SD among others. Please note that I have no ties to any of the companies which market these products. Also note that what works for one person may not work for another. The StriVectin-SD cream is probably the best I have tried for smile lines. It seems to work very quickly and is noticeable.
One prescription product I use for my acne but which I find to also helps my skin from aging is Tazorac cream.
Hope this helps some. The bottom line is that you have to try products on your own to see if they work or not. I would also recommend that you ask your dermatologist about what he or she suggests based on your unique skin type.
Thank you for your question.
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