April 2025 in “Antioxidants” In this study, the researchers found that the water-soluble fraction of Rhus semialata gall extract and its component Penta-O-Galloyl-β-D-Glucose promoted hair growth in human dermal papilla cells, and clinical trials supported these findings, showing improved hair density and appearance compared to placebo.
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October 2025 in “Iranian journal of pharmaceutical research” This study suggests that geranyl acetate may offer protective, anti-inflammatory, and cytoprotective effects against PPD-induced toxicity in keratinocyte cells, indicating its potential as a plant-derived treatment.
January 2023 in “International Journal of Research Publication and Reviews” This review details the causes, symptoms, and treatments for dandruff, emphasizing herbal ingredients with anti-dandruff properties used in shampoos and exploring their antifungal and anti-inflammatory mechanisms. It highlights dandruff's exploitation by personal care companies due to the lack of medical interventions.
March 2026 in “Stem Cell Reviews and Reports” 
August 2009 in “한국실험동물학회 학술발표대회 논문집” Fermented Rhus Verniciflua Stokes Extract may help hair grow in cells and mice.