If you weren't paying attention in high-school biology class (and who was?), peptides are sequences of molecules derived from combinations of amino acids. What does this have to do with beauty? Well, at the cellular level, peptides act as messengers, sending signals that help to promote the synthesis of collagen in the skin. Why not slather collagen directly on your face? Sadly, it's is too large to be absorbed, so peptides do the job instead, jumpstarting collagen production and slowing the formation of wrinkles, creases, folds, and furrows. Not surprisingly, peptide products are some of the most promising anti-agers around, and Chellá's advanced skin-care collection has combined them with natural botanicals, vitamins, and antioxidants for a potent age-defying mix the brand calls the Chell-X Complex.

The Chellá line includes the Micro-Exfoliating Cleanser ($35; chella.com), the Skin Firming Serum ($100), the Anti-Aging Formula SPF 15 Morning Crema ($75), the Replenish Formula Evening Crema ($85), and the Intensive Formula Eye Crema ($100)--all formulated with the Chell-X blend. If the line sounds pricey, that's because it is, but fortunately, the company offers free trial kits on its website so you needn't commit to a purchase unless you're satisfied. When I first tested the products, frankly, I was indifferent; the creams, serum, and slougher seemed fine but no better or worse than my standard formulas. After about three weeks of use, however, I started noticing subtle changes--my skin felt softer, smoother, and more hydrated, and the fine lines on my lips and forehead had softened slightly. True, it wasn't an instant transformation that made me look 15 years younger (a girl can dream, of course), but was it a worthwhile change? You bet. My advice? Order a trial pack, start on your Chellá regimen, and remember to give those messengers some time to deliver. --Jennifer Riley

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