March 2024 in “Molecules/Molecules online/Molecules annual” This study optimized the extraction process of bear grease through enzymatic hydrolysis and found that it was rich in unsaturated fatty acids, enhancing its hair growth-promoting properties in mice compared to traditional methods.
September 2011 in “대한미용학회지” In this study, topical application of 5% bear oil on C57BL/6 mice accelerated hair regrowth and increased hair follicle depth and size more than 2% bear oil, minoxidil, or ethanol.
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January 2018 in “Cosmetics” This review discusses side effects and allergy contact dermatitis caused by essential oils in cosmetic products and reports no new clinical results.
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November 2024 in “Scientific Reports” In this study, different drying methods for Hedychium spicatum rhizomes significantly affected the essential oil yield, antioxidant potential, and compound composition, with the HSOV30 method yielding the highest oil content, antioxidant activity, and specific compound levels such as 1,8-cineole and elemol.
November 2025 in “Discover Pharmaceutical Sciences” In this study, a nanoemulsion containing lavender, peppermint, and rosemary essential oils was developed and shown to promote hair growth in mice at a rate comparable to 2% topical minoxidil, suggesting a promising natural alternative due to its antioxidant and anti-inflammatory effects.