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Ask any skincare specialist and they will tell you that retinol is the holy grail of skincare
. This vitamin A derivative is one of the few products that has been backed by science and proven to prevent wrinkles
, boost collagen production, speed up cell turnover, and generally give you the smooth, glowing complexion
you've always dreamed of. While stronger retinoids are usually prescribed by a doctor, there are plenty of over-the-counter versions that are effective without being quite as harsh on the skin. And, best of all, there are some that don't bear the hefty price tag of their prescribed sisters. Here, we've rounded up 12 OTC retinol products that come in at $20 or less. Click through to find your newest skin savior.