This study found that rosemary oil significantly increased enzyme activities and IGF-1 mRNA expression related to hair growth in the skin of C57BL/6 mice.
January 2010 in “Jounal of The Korean Society of cosmetology” Rosemary oil may promote hair growth by enhancing enzyme activities and IGF-1 expression.
January 2008 in “한국미용학회지” This study found that in a shaving animal model of mice, increased enzyme activities and gene expression correlated with enhanced hair growth, suggesting they are good biomarkers in the anagen phase.
January 2007 in “동의생리병리학회지 = Journal of physiology & pathology in Korean Medicine” This study suggests that acetone extracts and certain fractions of Drynariae Rhizomas may support hair growth when applied topically in C57BL/6N mice models, indicating potential use for treating alopecia areata.
August 1994 in “Journal of dermatological science” Different substances affect hair and skin cell growth in various ways, with some promoting and others inhibiting cell proliferation.