Camellia nitidissima Flower Extract Alleviates Dermal Papilla Cell Dysfunction by Regulating 11β-HSD1 and the TGF-β2/Smad and Wnt/β-Catenin Pathways
Psychological stress activates the local hypothalamic–pituitary–adrenal (HPA)-like axis in hair follicles, leading to cortisol overproduction and dysfunction of dermal papilla cells (DPCs). However, effective natural ingredients targeting this mechanism remain scarce. To investigate whether Camellia nitidissima flower...