TLDR Rosemary oil promotes hair growth.
The study investigated the effect of rosemary essential oil on hair growth in C57BL/6 mice, dividing male mice into four groups: normal, vehicle control, positive control, and experimental. After 4 weeks of daily topical applications, hair regrowth was significantly faster in the rosemary oil (42%) and minoxidil (55%) groups compared to the normal (3%) and vehicle control (20%) groups. Histological observations showed that the rosemary oil and minoxidil groups had higher hair follicle numbers, follicle depth, and dermal thickness, along with fewer mast cells. These findings indicated that rosemary oil effectively stimulated hair growth in this animal model.
397 citations
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February 2004 in “British Journal of Dermatology” Minoxidil boosts hair growth by opening potassium channels and increasing cell activity.
72 citations
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November 2002 in “Journal of Investigative Dermatology” 
1113 citations
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August 1999 in “The New England Journal of Medicine” Hair follicle biology advancements may lead to better hair growth disorder treatments.
April 2025 in “Natural Product Communications” Angelica sinensis and Ligusticum sinense essential oils promote hair growth safely.
November 2024 in “Clinical Cosmetic and Investigational Dermatology” Rosemary oil may effectively treat hair loss with fewer side effects, but more research is needed.
45 citations
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August 2019 in “Dermatologic Therapy” Hair loss treatments work better with lifestyle changes.
July 2021 in “IntechOpen eBooks” Ginseng, especially its component ginsenosides, can promote hair growth, reduce hair loss, and potentially treat conditions like alopecia by affecting cell pathways and cytokines.
There are many treatments for common hair loss, but more trials are needed to decide which are best.
