Overview
What is it?
Rosemary oil is a natural essential oil derived from the rosemary plant (Rosmarinus officinalis), which is a common household plant with needle-like leaves and white flowers. It has been used for centuries for its medicinal properties, including benefits for hair and scalp health.
How does it work?
Rosemary oil works to combat hair loss by promoting hair growth through its antiandrogenic activity, which involves inhibiting testosterone and 5-alpha-reductase, enzymes linked to hair loss. It also has antioxidant properties that protect hair follicles from damage and contains flavonoids that may stimulate hair growth. Additionally, rosemary oil improves blood circulation to the scalp, which can enhance hair follicle health and promote the transition of hair from the resting phase (telogen) to the growth phase (anagen) .
What are the benefits?
Rosemary oil has been shown to promote hair growth, reduce hair loss, and improve hair quality by increasing hair length, weight, and protein content. It is particularly effective for androgenetic alopecia (AGA), a common form of hair loss. Studies have also found that rosemary oil can be as effective as minoxidil 2%, a common hair loss treatment, but with fewer side effects .
Effectiveness
What does the research say?
Research supports the use of rosemary oil for treating hair loss. A clinical study found that a 1% rosemary oil formulation significantly increased hair length and weight in mice compared to a control group . Another study comparing rosemary oil to minoxidil 2% found that both treatments significantly increased hair count after 6 months, with no significant difference between the two . Additionally, rosemary oil has been shown to enhance hair follicle development in animal studies, further supporting its efficacy .
Side Effects
Scalp itching
Some users may experience mild scalp itching, which was reported in studies comparing rosemary oil to minoxidil .
Temporary redness
Temporary redness of the scalp may occur, though this is typically mild and resolves quickly .
Sensitivity
A small number of users may experience sensitivity or mild irritation, but this is rare and usually not severe .
Evidence
Clinical Studies & Trials
[1] Natural products for male androgenetic alopecia
This review explores natural products, including rosemary oil, as alternatives or complements to conventional treatments for male androgenetic alopecia (AGA).
View study[2] The Evidence Behind Topical Hair Loss Remedies on TikTok
This review investigates the evidence behind popular hair loss remedies, including rosemary oil, often promoted on social media platforms like TikTok.
View study[3] Evaluation of Herbal Hair Lotion loaded with Rosemary for Possible Hair Growth in C57BL/6 Mice
This study evaluated a 1% rosemary oil hair lotion, finding significant hair growth promotion in mice compared to controls and minoxidil-treated groups.
View study[4] Rosemary oil vs minoxidil 2% for the treatment of androgenetic alopecia: a randomized comparative trial
This randomized trial compared rosemary oil to minoxidil 2% for treating androgenetic alopecia, finding both treatments effective with no significant difference in hair count improvement.
View study[5] Alopecia Management Potential of Rosemary-Based Nanoemulgel Loaded with Metformin: Approach Combining Active Essential Oil and Repurposed Drug
This study explored a rosemary-based nanoemulgel for hair growth, finding it effective in increasing hair follicle count in rats.
View study