I reached out to double board-certified facial plastic and hair surgeon Dr. Gary Linkov to see if he could provide some insight into rosemary oil and why it works.
"Rosemary oil does have evidence to suggest it can reduce hair loss and increase hair growth," Dr. Linkov explained. "The mechanism is believed to be related to enhancing microcapillary perfusion. This is mainly based off of a study performed in 2015."
"The study was a single-blind, randomized clinical trial that assessed the clinical efficacy of rosemary oil in the treatment of AGA (androgenic alopecia) and compared its effects to minoxidil 2% ointment," Dr. Linkov continued. "The study showed that application of rosemary oil was as effective as minoxidil 2% ointment. In addition, there was better treatment adherence in the rosemary group as compared with in the minoxidil group. This provided evidence with respect to the efficacy of rosemary oil as an alternative treatment option for androgenic alopecia."
However, Dr. Linkov went on to add, "Keep in mind that there was no comparison made to 5% minoxidil foam, which is the predominant formulation used by men and women."