In Aleppo, one bar often did everything: hands, body, laundry and hair. That habit has travelled, and "Aleppo soap for hair" is now one of the most common questions people ask about it.
This guide does not promise anything about your hair. Instead it explains what is known: how soap differs from shampoo, why water hardness matters so much, how people who use a bar on their hair go about it, and who tends to give up. If you are new to the soap itself, start with what Aleppo soap is.
Key takeaways
- Soap is not shampoo. Most bathing soaps measure pH 9-10 and most shampoos pH 6-7 (Tarun et al., 2014).
- The scalp is acidic, at about pH 5.5 (Gavazzoni Dias et al., 2014).
- Hard water changes everything. Soap reacts with calcium to form scum, which many people feel as a waxy coating (USGS).
- There is no clinical research on Aleppo soap and hair specifically.
- Some people should skip it: anyone with a laurel sensitivity, a scalp condition or treated hair should ask a professional first.
The short answer
Yes, people wash their hair with Aleppo soap, but it is a true soap, not a shampoo, and the results depend heavily on your water and technique. Soap is more alkaline than the scalp and leaves residue in hard water, so some people love it and others give up within a week. There is no research showing that it is good or bad for hair specifically.
A note on our bars: Alepo sells its bars as traditional soap. We make no hair-care claims for them. This article describes how other people use Aleppo soap and what research says about soap in general.
Why soap behaves differently from shampoo
Aleppo soap is made by saponification: olive and laurel oils react with lye to form soap and glycerin. Our ingredients guide explains each part of the label. The result is a true soap, and true soaps are alkaline.
A 2014 study of bathing soaps and shampoos in India found that most soaps measured pH 9-10, while most shampoos measured pH 6-7 (Tarun et al., 2014). The skin surface is more acidic still, usually below pH 5 (Lambers et al., 2006, via Wikipedia).
For hair, a 2014 review in the International Journal of Trichology put scalp pH at about 5.5. It found that an alkaline pH increases the negative electrical charge on the hair fibre, which increases friction between fibres, and the authors suggested shampoos should not exceed pH 5.5 (Gavazzoni Dias et al., 2014). That is a finding about alkaline products in general, and it is the main reason hair washed with any soap can feel rougher or more tangled.
For a wider comparison of soap types, see Aleppo soap vs regular soap.
Hard water: the most common reason it goes wrong
If you read reviews from people who tried a bar on their hair, the complaints are strikingly similar: waxy, sticky, heavy, dull. The usual explanation is not the soap but the water.
The U.S. Geological Survey classes water from soft (0-60 mg/L as calcium carbonate) to very hard (over 180 mg/L). In hard water, soap reacts with calcium to form "soap scum", and more soap is needed to get hair or hands clean (USGS). On hair, that scum is what people feel as a coating.
Pro Tip: Look up your water before you try. Most water suppliers publish hardness by postcode. If you are in the hard or very hard band, expect residue and plan for a longer rinse.
How people wash their hair with an Aleppo bar
People who stick with bar soap on their hair tend to describe the same routine. These are practices, not promises:
- Soak. Wet the hair and scalp thoroughly with warm water.
- Lather in the hands. Rub the bar between wet hands rather than directly on the hair, which can leave bits of soap behind.
- Work it in. Spread the lather over the scalp with the fingertips, then through the lengths.
- Rinse for longer than you would with shampoo, until the water runs clear and the hair no longer feels slippery.
- Optional rinse. Some people finish with a diluted vinegar rinse, a common habit among bar-soap users, especially in hard water.
Our general guide on how to use Aleppo soap covers storage and making a bar last. A draining soap dish keeps a shared bar dry between uses.
Pro Tip: Less is more. Most of the waxy feel people report comes from using too much soap in hard water. A few passes of the bar between wet hands is usually enough.
The "transition period": what is really going on
Forums are full of advice to "push through" a few weeks of strange-feeling hair after switching from shampoo to soap. Some people describe it as the scalp "adjusting" or "detoxing".
We found no published research on this. The more likely explanations are the ones above: residue from hard water, too much soap, and short rinsing. Those are things you can change on the first day. If your hair still feels wrong after a few weeks of good technique, soap is probably not the right fit for you, and that is fine.
Which strength do people choose?
No laurel strength has been shown to suit hair better than another. The percentage mainly changes the scent, the colour of the lather and the price; our guide to the laurel oil percentage explains the differences in detail.
For reference, Alepo makes four strengths: Pure Olive, 10% laurel, 20% laurel and 40% laurel. Whatever you choose, it is sold as soap, with no hair-care claims.
Who tends not to get on with it
| Situation | What people commonly report | What they usually try |
|---|---|---|
| Soft water (0-60 mg/L) | Rich lather, easy rinsing | Short rinse, small amount of soap |
| Hard water (over 120 mg/L) | Waxy or sticky feel, dull look | Longer rinse, a diluted vinegar rinse or a filter |
| Long or thick hair | More lather and rinsing needed | Lathering in the hands, working in sections |
| Coloured or treated hair | Not studied | Asking their hairdresser first |
| Sensitive scalp or a scalp condition | Not studied | Asking a dermatologist before trying soap |
| Known laurel sensitivity | Risk of reaction | Avoiding laurel bars altogether |
- People with a laurel sensitivity. Laurel oil contains sesquiterpene lactones, a known group of contact allergens, with cross-reactions reported to daisy-family plants (Altmeyers Encyclopedia). Our article on Aleppo soap side effects covers this in detail.
- People with coloured or chemically treated hair. There is no data on soap and treated hair. Ask your hairdresser.
- People with a scalp condition. If you are managing any scalp or skin condition, talk to a dermatologist before changing products.
- People in very hard water areas who do not want to change their routine.
Pro Tip: Before trying any new soap, wash a small patch of skin on the inner arm once or twice a day for a week. The side-effects guide has the full patch test.
Keep it out of your eyes
Like every true soap, Aleppo soap stings if it gets into the eyes, because of its alkaline pH. Tilt your head back when rinsing, keep your eyes closed, and rinse with plenty of clean water if lather gets in. Seek medical advice if irritation lasts.
Curious about the soap itself? Four strengths, from Pure Olive to 40% laurel, with the laurel percentage stated on every bar. See all Aleppo soaps
Dažniausiai užduodami klausimai
Ar Alepo muilas yra tas pats, kas šampūnas?
Ne. Tradicinis Alepo gabalėlis yra muilas, o šampūne gali būti kitokių plaunamųjų medžiagų ir kitoks pH. Muilas taip pat gali reaguoti su kieto vandens mineralais ir palikti apnašų, todėl rezultatas gali skirtis nuo šampūno. ALEPO neteigia, kad šie muilai skatina plaukų augimą, šalina pleiskanas ar gydo galvos odą. Produktus naudokite pagal etiketėje nurodytą paskirtį.
Kodėl kietame vandenyje muilas gali palikti apnašų?
Kietame vandenyje esantys kalcis ir magnis reaguoja su muilu ir gali sudaryti netirpias nuosėdas. Jos gali likti ant paviršių, o plaunant plaukus – suteikti apsunkusių plaukų pojūtį. Tai nėra toksinų šalinimo požymis. Nuplaukite likučius ir leiskite muilui bei muilinei išdžiūti. Konkrečiai paskirčiai skirta priemonė gali būti tinkamesnė nei vien laurų procento keitimas.
Koks yra ALEPO muilo pH?
Tikras muilas yra šarminis, tačiau čia neskelbiame konkrečios ALEPO partijos pH tyrimo rezultato. Kitų muilų bendras pH intervalas nėra jūsų muilo tyrimas. Nei natūrali sudėtis, nei didesnis laurų procentas nepadaro muilo neutralaus pH. Jei pasirinkimui svarbus tikslus pH, paprašykite konkretaus produkto duomenų.
Ką daryti, jei muilas dirgina?
Nebenaudokite produkto ir nuplaukite sudirgusią vietą vandeniu. Jei dirginimas nepraeina arba atsiranda bėrimas, kreipkitės į medikus. Natūralūs aliejai taip pat gali sukelti reakcijų, todėl nemalonių pojūčių nelaikykite būtinu prisitaikymu. Išsaugokite pakuotę ir partijos informaciją, jei reikėtų pranešti apie su produktu susijusią problemą.
The bottom line
Washing hair with Aleppo soap is an old habit, not a proven hair treatment. It is a true soap, more alkaline than the scalp and prone to leaving scum in hard water, so the results depend far more on your water and rinsing than on the bar.
If you are curious, check your water, use less soap than you think and rinse longer. And if it does not work for you, the bar is still a very good soap. For the bigger picture, read what the evidence says about Aleppo soap benefits, how to spot a fake bar, and why traditional bars are cured for months. The craft itself is recognised by UNESCO.
Try a few strengths side by side. Our soap collection lets you compare scents before choosing a favourite bar. Free EU shipping over €50.
Related reading: the best Aleppo soap brands, where to buy Aleppo soap and a plastic-free bathroom with Aleppo soap.
This article is for general information and is not medical advice.
Sources
- Gavazzoni Dias M.F.R. et al. "The shampoo pH can affect the hair: myth or reality?" International Journal of Trichology, 2014. https://pmc.ncbi.nlm.nih.gov/articles/PMC4158629/
- Tarun J. et al. "Evaluation of pH of bathing soaps and shampoos for skin and hair care." Indian Journal of Dermatology, 2014. https://doaj.org/article/b16ff7fe3e7a4ddb92ebb672cfe1c476
- U.S. Geological Survey, Water Science School. "Hardness of water." https://www.usgs.gov/special-topics/water-science-school/science/hardness-water
- Lambers H. et al. "Natural skin surface pH is on average below 5." International Journal of Cosmetic Science, 2006 (summarised in Wikipedia, "Acid mantle"). https://en.wikipedia.org/wiki/Acid_mantle
- Wikipedia. "Saponification." https://en.wikipedia.org/wiki/Saponification
- Altmeyers Encyclopedia. "Laurel, genuine." https://www.altmeyers.org/en/naturopathy/laurel-of-genuine-142917
- UNESCO. "Craftsmanship of Aleppo Ghar soap." 2024. https://ich.unesco.org/en/RL/craftsmanship-of-aleppo-ghar-soap-02132
