Rosemary oil has emerged as a promising, low-cost option for stimulating hair growth — and unlike many home remedies, this one has scientific research behind it. In this article, based on his educational video, Dr. John Watts — dermatologist, trichologist and hair transplant surgeon in Hyderabad — explains how rosemary oil works and what the research actually shows.
What is rosemary oil?
Rosemary oil is extracted from the medicinal plant Rosemary (Rosmarinus officinalis). It is known to be effective in controlling hair fall and may help in preventing androgenetic alopecia (genetic baldness). It can be a useful alternative for people who cannot use conventional hair loss treatments for various reasons.
How does it work?
According to Dr. John Watts, rosemary oil acts through microcapillary perfusion — it improves blood circulation to the small blood vessels in the hair roots of the scalp, much like minoxidil does.
“The rosemary oil uses the same technique that minoxidil uses in improving the blood circulation that helps in hair growth, controlling hair fall and preventing baldness,” explains Dr. John Watts.
The research: rosemary oil vs minoxidil 2%
Dr. Watts cites a landmark study titled “Rosemary oil vs minoxidil 2% for the treatment of androgenetic alopecia: a randomized comparative trial”, conducted by researchers led by Yunes Panahi.
The trial followed two groups of 50 subjects each, all with common androgenetic alopecia, for six months. One group applied 2% minoxidil; the other used rosemary oil as a topical lotion. Subjects were photographed on day one and at the end of the sixth month.
“At the end of the experiment it was found that those who used rosemary oil had considerable hair growth results, as the application of 2% minoxidil had achieved. There was not much difference,” informs Dr. John Watts. Notably, the rosemary oil group did not experience the itching issues that some minoxidil users reported.
How to apply rosemary oil
If you intend to use rosemary oil, Dr. Watts suggests mixing it with a carrier: take about 5 drops of rosemary oil, mix with coconut oil, and give the scalp a gentle massage. It can then be rinsed off with water.
The bottom line
Rosemary oil is one of the few natural options with comparative clinical evidence behind it. However, results vary from person to person, and significant or fast-progressing hair loss should always be evaluated by a dermatologist or trichologist first.
This article is for educational purposes only and is not a substitute for professional medical advice. Consult a qualified dermatologist for diagnosis and treatment.
Frequently asked questions
Is rosemary oil as effective as minoxidil?
A randomized comparative trial found that after 6 months, participants using rosemary oil had hair growth results comparable to those using 2% minoxidil, with less scalp itching.
How do I use rosemary oil for hair growth?
Dr. John Watts suggests mixing about 5 drops of rosemary oil with coconut oil and gently massaging it into the scalp. It can be rinsed off afterwards.
How does rosemary oil work on the scalp?
It improves blood circulation to the small blood vessels supplying the hair roots — a mechanism similar to how minoxidil works.
