hair care · hair oils
Rosemary Oil for Hair Growth: DoesIt Work?
Does rosemary oil work for hair growth? What the evidence shows, why one small trial is not proof, how to use it safely, and when to see a dermatologist instead.
Hairover Team
Rosemary oil might help, but the evidence is thin. Its reputation rests largely on one small trial from 2015 that compared it with 2% minoxidil in 100 men with pattern hair loss. Both groups saw a similar increase in hair count after six months. That is interesting, but a single small study isn’t proof, and rosemary oil should not replace medical advice if you are losing hair.
What the trial found
Reviews describe a single-blind, randomized trial of 100 men aged 18 to 49 with androgenetic alopecia. Half used rosemary oil, and half used 2% minoxidil, for six months. Hair counts increased in both groups by the end, with no significant difference between them. Scalp itching was reported more with minoxidil.
Why that isn’t the final word
- It’s one trial. Results haven’t been widely repeated.
- It’s small. A larger study could produce different results.
- There was no placebo group. We can’t tell how much would have happened anyway.
- It compared against a low dose. Minoxidil at 2% is not the strongest option available.
- It involved only men with one type of hair loss. The results may not apply to women or to other causes.
A trial like this gives you a reason to look further, not a reason to swap treatments.
How to use it safely
If you want to try it, it’s low-cost and mostly low-risk when diluted.
- Dilute it. Add a few drops of essential oil to a tablespoon of a carrier oil, such as jojoba. Follow the instructions on the bottle.
- Patch test. Try a small area on your arm, and wait 24 hours.
- Massage it gently onto the scalp a few times a week.
- Wash it out after a few hours, or as directed.
Or use a shampoo or serum that already has rosemary in it, though these may have very different concentrations from the study.
Who should be careful
- People with sensitive skin or scalp conditions. Essential oils can irritate.
- Anyone who is pregnant or breastfeeding. Check with your doctor first.
- Anyone with dandruff or seborrheic dermatitis. Oils may make it worse.
- Children and pets. Essential oils can be harmful. Keep them stored safely.
Stop using it if you notice any redness, itching, or burning.
When to see a doctor instead
Hair loss has many causes, including genetics, thyroid problems, low iron, stress, and scalp conditions. Some of them need treatment, and early treatment often works best. See a dermatologist if your shedding is sudden, if your part is widening, or if you have bald patches. Our guide on how fast hair grows lists the warning signs.
Other ways to help your hair look fuller
While you wait for any treatment to work, cuts can do a lot. Short, textured shapes make thin hair look denser, as covered in haircuts for thinning hair and hairstyles for thin hair. Upload a clear photo to Hairover, get a hair analysis, and try hairstyles on your own face in Style Studio.
Preview fuller-looking cuts on your own photo with Hairover.
FAQ
How long does rosemary oil take to work?
The trial most often cited ran for six months. If you try it, plan on months rather than weeks, and keep your expectations realistic.
Can I put rosemary oil directly on my scalp?
Don't use undiluted essential oil on your skin. Dilute it in a carrier oil, and patch test first, since essential oils can irritate skin.
Is rosemary oil better than minoxidil?
There isn't enough evidence to say that. One small trial found similar results to 2% minoxidil, but minoxidil has much more research behind it.
