The ingredient: Stem cells
Also known as: Stem-cell technology
Found in: Anti-aging, anti-wrinkle products
Where it comes from: The stem cells found in beauty products come plant cells that are harvested in the laboratory. They're usually diluted before they're added into a formula.
What it does: Stem cells are a type of cell that can turn into different types of tissue (think: the wild card in a poker game). Scientists believe that these cells may stimulate the skin to replicate itself, creating a fresh, youthful layer. Because the cells in lotions, creams, and serums aren't alive or active, they aren't associated with any side effects.
Expert source: Art Georgalas, a cosmetic chemist in Warwick, New York, and owner of Georgalas Endeavors, LLC
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