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The growth factor based skin booster produced by fibroblast (QTcell by S.THEPHARM Co., Ltd. in Seoul, Korea) (A). This skin‐booster adopts a unique cultivation method called “Functionally Enhanced Cell Spheroid” for growing human dermal fibroblasts (B). During this technique, cells loosely attach to a protein matrix, prompting simultaneous cell‐to‐cell connections.
