Rosemary Hair Rinse: Recipe and the Real Research
A cooled rosemary tea makes a fragrant final rinse for your hair. Here is how to make it, what the famous hair-growth study actually tested, and why it is not a fix for hair loss.
Rosemary has become the herb of the moment for hair. Social media is full of rosemary water sprays and rinses, often with promises of thicker, faster-growing hair.
A rosemary rinse is easy to make from a kitchen herb and smells wonderful. But the research behind the hype was done with something quite different from a homemade rinse. This guide shows you how to make one, explains what the evidence does and does not show, and covers the safety steps that matter for your scalp.
Why people use it
Rosemary is a familiar cooking herb with a long history in home remedies. In Europe, rosemary leaf is used traditionally on the skin as a bath additive, and the European Medicines Agency recognizes that use for easing minor muscle and joint aches.
For hair, the appeal is mostly about how it feels: a cool, fragrant final rinse after washing that leaves your hair smelling fresh. The hair-growth interest grew mainly from one clinical trial that has been shared widely online.
Simple Rosemary Hair Rinse
You need
- dried rosemary leaves, or 3 to 4 fresh sprigs, rinsed2 tbsp
- freshly boiled water500 ml (2 cups)
Method
- Put the rosemary in a heatproof jug or bowl and pour the boiled water over it.
- Cover and steep for 15 to 20 minutes.
- Strain through a fine sieve or a clean cloth so no leaves remain.
- Let it cool completely to room temperature, or until it is just lukewarm.
- Shampoo and condition your hair as usual and rinse well.
- Lean your head back or over the sink, keep your eyes closed, and slowly pour the rinse over your hair, working it gently into your scalp with your fingertips.
- Leave it in, or rinse with plain water if you prefer. Pat your hair dry with a towel.
Tips
- Make it fresh. Keep any leftover in a covered jar in the fridge and throw it away after 24 hours.
- A stronger brew is not better. If your scalp feels tight or itchy, make it weaker or stop.
- Do not add rosemary essential oil to the rinse. Essential oils should never go on the skin undiluted.
What the evidence says
The study most often quoted was published in 2015 in the journal Skinmed. It followed 100 people with androgenetic alopecia, the common hereditary pattern of hair loss. Half used rosemary oil on the scalp and half used 2 percent minoxidil, a standard hair-loss treatment, for 6 months. Neither group saw a meaningful change at 3 months. At 6 months, hair counts had risen in both groups, with no significant difference between them. Scalp itching increased in both groups, though more often with minoxidil.
That is interesting, but it is one study, it used a prepared rosemary oil rather than a tea, and it did not compare rosemary with doing nothing. A 2025 review of plant remedies for hair loss in women around menopause, available through the US National Library of Medicine, notes that rosemary has the most clinical support among the herbs it looked at, yet most of the research in this area still comes from lab and animal work, with short studies and few trials in people.
No study has tested a homemade rosemary rinse for hair growth. So the honest summary is that a rinse may be a pleasant part of your routine, but there is no evidence it will regrow hair or slow hair loss.
Patch test before you start
Even kitchen herbs can irritate skin. Before using the rinse on your whole scalp, dab a little of the cooled rinse on the inside of your arm and leave it for 48 hours. If you notice redness, itching, swelling or a rash, do not use it.
The European Medicines Agency advises that rosemary preparations for the skin should not be used on broken or irritated skin, or by anyone allergic to rosemary.
Questions people ask
Does rosemary water make hair grow faster?
There is no evidence that rosemary water or a rosemary rinse makes hair grow faster. The study people quote used rosemary oil for 6 months in people with hereditary hair loss, and it was a single trial.
How often can I use a rosemary rinse?
Once or twice a week after washing is plenty for most people, as long as your patch test was clear and your scalp feels comfortable.
Is rosemary as good as minoxidil?
One trial found similar hair counts with rosemary oil and 2 percent minoxidil after 6 months, but one study is not enough to say rosemary works as well. If you are losing hair, a dermatologist can help you choose a proven treatment.
Sources
- Rosemary oil vs minoxidil 2% for the treatment of androgenetic alopecia: a randomized comparative trial — Skinmed (via PubMed, NCBI)
- Botanical drug preparations for alleviating hair loss in menopausal women: a global ethnopharmacological mini-review — PubMed Central, NCBI
- Rosmarini folium - herbal medicinal product — European Medicines Agency
- Hair loss: Diagnosis and treatment — American Academy of Dermatology
This article is for general information only and is not medical advice. Herbs can interact with medicines and health conditions. Talk to a doctor or pharmacist before trying a herbal remedy, especially if you are pregnant, breastfeeding, giving it to a child, or taking any medication.
