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During the past decade, peptides have taken on growing prominence in the skin care category. They’ve become so popular, in fact, that countless skin care products proudly feature them on their ingredient lists, whether sold by physicians and licensed skin care professionals, or department stores and drugstores. The excitement surrounding peptides isn’t simply reserved for product formulators and marketers, however. Take a look at the skin care conversation among consumers online, and you’ll find plenty of individuals pronouncing the positive impact peptide formulations have had on their skin. There’s little doubt that consumers are beginning to consider them the next big thing.
Yet, despite the vigor with which skin care brands promote peptide formulations and the growing consumer appetite for such products, their benefits have not yet been fully proven in the scientific arena. Certainly, potential exists, but so do limitations. Whether peptides truly are a panacea or simply another ingredient propelled into the spotlight may not yet be known for several years. Until then, it’s essential for skin care professionals to be well-versed on the topic, because, most certainly, your clients will soon be asking your opinion of peptides, if they haven’t already.
Peptides are biologically active compounds that closely resemble proteins—both are chains of amino acids. The difference? Peptide chains include fewer amino acids. Generally, a chain with more than 50 amino acids is a protein while those with fewer is a peptide. However, there are exceptions. Peptides are classified according to their length. Therefore, you’ll often encounter terms such as dipeptides—two amino acids; tripeptides—three; tetrapeptides—four; pentapeptides—five; and so on. Although there are probably thousands of naturally occurring peptides, to date, only several hundred have been characterized.1
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