Aleppo Soap Benefits: What Tradition Says and What Research Shows

Search for Aleppo soap benefits and you will find lists of ten, fifteen, sometimes twenty claims. Clearer skin, stronger hair, fewer wrinkles. Almost none of them link to a study.

We went looking for the evidence. In our research for this article we did not find a single published clinical trial on Aleppo soap itself. What we did find is centuries of tradition, solid lab research on its two oils, and a handful of practical benefits you can count on. Here is each layer, and how much weight it can carry.

Key takeaways

• No clinical trial found. Every skin or hair claim about Aleppo soap rests on tradition or on lab studies of its oils.
• It cleans like any true soap. The FDA found antibacterial soaps are not proven better than plain soap and water (FDA).
• Laurel's lab results are indirect. Studies used laurel leaf oil in test tubes; soap uses the berry oil, which is mostly oleic acid (Türkmen and Koçer, 2021).
• Like all true soap, it is alkaline. Most bar soaps measure pH 9-10, while skin sits below 5 (Tarun et al., 2014).
• The proven benefits are practical: four ingredients, no perfume, no plastic bottle, and a hard bar that lasts.

The short answer

Aleppo soap's documented benefits are practical, not medical. It is a true soap made from only olive oil and laurel oil, with no perfume, colourants or preservatives, and it cleans as well as any plain soap. Claims that it treats skin conditions, grows hair or slows ageing have, as far as we could find, never been tested in a published trial.

That does not make it a bad soap. It makes it an honest one. If you want a simple, unscented bar with a long history, it delivers exactly that. For the basics of how it is made, see our guide to what Aleppo soap is.

Three layers of evidence

Claims about Aleppo soap come from three very different kinds of evidence. Mixing them up is how a centuries-old habit turns into a "proven cure" online.

• Tradition tells you people have valued it for generations. It does not tell you what it does to skin.
• Lab studies test the oils, often in test tubes and often a different part of the plant. They suggest, but do not prove.
• Clinical trials test the actual product on people. For Aleppo soap, we found none.

What tradition says

Aleppo soap is one of the oldest hard soaps still made, and its craft is now recognised by UNESCO as intangible cultural heritage (UNESCO, 2024). Families have passed the method down for generations, and in Syria one bar traditionally serves for hands, body and hair, and for shaving.

That long use is real and worth respecting. People kept using it because they liked how it felt, how long it lasted and how simple it was. But tradition is a record of preference, not a clinical result. When a seller turns "used for centuries" into "treats eczema", they have skipped two layers of evidence.

If you are curious how people actually use it on hair, our guide to washing hair with Aleppo soap covers the method and the transition period people describe.

What research says about laurel oil

Laurel gets most of the credit in online claims, so it deserves the closest look. The research is real, but it is narrower than the claims built on it.

The lab studies use the leaf, not the berry

A 2017 study in Molecules found that essential oil from laurel leaves inhibited several bacteria in lab tests, with 1,8-cineole as its main compound (Caputo et al., 2017). A 2023 study of laurel leaf oil from Palestine reported antimicrobial and antioxidant activity, also in vitro (Jaradat, 2023).

Both are test-tube studies of leaf essential oil. Neither tested soap, and neither tested people.

Soap uses the berry oil, which is different

Aleppo makers use oil from laurel berries, boiled and skimmed by hand (UNESCO, 2024). That oil is a fatty oil, closer in make-up to olive oil than to leaf essential oil.

A 2021 analysis found traditionally extracted laurel berry oil was 55% oleic acid, with smaller shares of palmitic and linoleic acid (Türkmen and Koçer, 2021). During saponification, those fatty acids become soap. So the leaf-oil lab results cannot simply be carried over to a rinse-off bar.

Pro Tip: The laurel percentage changes the scent and character of a bar, from mild to deep bay. Choose it by smell and feel, not by promised effects. Our guide to the laurel oil percentage compares all four strengths.

What research says about olive oil

Olive oil has a gentle reputation, but the one well-known skin study points the other way. In a 2013 trial, 19 adults applied raw olive oil to their forearms twice a day for four to five weeks. The researchers found it significantly weakened the skin barrier, unlike sunflower seed oil (Danby et al., 2013).

That study tested oil left on the skin. In soap, the olive oil has been converted into soap and is rinsed off within a minute. So the finding does not transfer directly either way. It is simply a reminder that "natural oil" does not automatically mean "good for skin".

Our full breakdown of Aleppo soap ingredients explains what happens to each oil during saponification.

Is Aleppo soap antibacterial?

Aleppo soap removes germs the way all soap does. Soap molecules lift dirt, oil and microbes from the skin so water can rinse them away. That is why handwashing works.

Extra antibacterial ingredients do not appear to add much. In 2016 the FDA banned 19 antibacterial ingredients, including triclosan, from consumer washes, and states there is not sufficient evidence that antibacterial soaps prevent illness better than plain soap and water (FDA).

So Aleppo soap cleans like a good plain soap. Whether laurel adds anything beyond that in a bar you rinse off has not been shown.

The pH question

All true soap is alkaline, and Aleppo soap is a true soap. A 2014 study found most bathing soaps measure pH 9-10 (Tarun et al., 2014). Healthy skin surface averages below pH 5 (Lambers et al., 2006, via Wikipedia).

This is why some people find any bar soap leaves their skin feeling tight. It is not specific to Aleppo soap, and skin returns to its own pH after washing. If you notice tightness, rinse well, wash less often, or use the bar only where you need it. Our guide to Aleppo soap side effects and pH goes into detail, including who should take extra care.

Claims vs evidence at a glance

Here is every common benefit claim, sorted by how much evidence stands behind it:

The first five rows are why most people buy Aleppo soap and keep buying it. The last three are why you should be wary of sellers who lead with them. Our comparison of Aleppo soap vs regular soap looks at what actually differs in the ingredients.

The benefits you can count on

Strip away the marketing and Aleppo soap still has real, checkable advantages:

• Four ingredients. Olive oil, laurel oil, water and lye. You can read the whole label in five seconds.
• No added scent. Any smell comes from the oils, from almost neutral in pure olive to deep bay in 40% laurel.
• No plastic bottle. A solid bar replaces bottled shower gel. More in our guide to a plastic-free bathroom.
• A hard, slow-wearing bar. The 6-9 month cure drives out water, so a bar kept dry lasts far longer than a fresh soap (UNESCO, 2024).
• Plant-based. No animal fat, which matters if you avoid animal ingredients.
• A living craft. Buying real Aleppo soap supports a tradition that nearly disappeared in the war. See our history of Aleppo soap.

Find your strength. Not sure which laurel level you will like? Compare all four strengths in our soap collection - free EU shipping over €50.

How to try Aleppo soap sensibly

1. Start mild if you prefer a light scent. A 10% laurel bar or pure olive bar is the gentlest introduction.
2. Patch test first. Wash a small area, such as the inside of your forearm, once a day for a few days.
3. Rinse well. Soap left on the skin is more likely to feel drying.
4. Watch how your skin feels. If it feels tight or irritated, use it less often or stop.
5. Ask a professional if you have a skin condition. A dermatologist can tell you whether any bar soap suits you.

Pro Tip: Keep the bar on a draining dish between uses. A wet bar softens and wears away quickly; a dry one lasts for weeks. Use a draining soap dish, and see our guide on how to use Aleppo soap.

Frequently asked questions

Does 100% natural mean Aleppo soap is suitable for everyone?

No. Natural ingredients can still cause irritation or allergic reactions, and a short ingredient list is not a guarantee of suitability. The laurel percentage describes the recipe, not a medical benefit or a recommended skin type. Follow the product’s directions and avoid ingredients you know you react to. ALEPO does not claim to treat skin conditions.

Does Aleppo soap treat eczema, acne or other skin conditions?

ALEPO does not claim that its bars treat eczema, acne or any other skin condition. Traditional use and studies on individual oils do not establish that a finished soap treats a condition. Do not choose a laurel percentage as a treatment dose or replace prescribed care with soap. Ask a qualified healthcare professional about a product suitable for your condition.

Is ALEPO soap an antibacterial or disinfectant product?

We do not market ALEPO bars as disinfectants or make an antibacterial efficacy claim. A laboratory finding about laurel leaf essential oil is not proof about laurel berry oil after it has been made into soap. The laurel percentage therefore should not be interpreted as a measure of germ-killing power.

What is the pH of ALEPO soap?

True soap is alkaline, but we do not publish a batch-specific pH measurement for ALEPO here. A general pH range quoted for other soaps is not a test result for your bar. Neither a natural ingredient list nor a higher laurel percentage makes a soap pH-neutral. Request product-specific information if a measured pH matters to your choice.

Which Aleppo soap should I try first?

Choose pure olive oil for the mildest scent, 10% laurel for a light bay note, 20% for a more noticeable bay scent, or 40% for the deepest bay scent in our range. If you want to compare before choosing a favourite, the Discovery Set contains one of each. Choose by scent, ingredients and budget; a higher percentage is not a skin-treatment rating.

The bottom line

Aleppo soap does not need miracle claims. It is a simple, unscented, plant-based soap with a remarkable history, and it cleans as well as any plain soap. Its lab-tested oils are interesting, but they are not proof that the bar does anything more.

Choose it for what it is. If a seller promises it will cure something, that tells you more about the seller than about the soap. And if you want to be sure your bar is genuine, our guide on how to spot fake Aleppo soap has seven quick checks.

Try the real thing. Four strengths, made in Aleppo, cured the traditional way. Shop all four Aleppo soaps - free EU shipping over €50.

Sources

1. U.S. Food and Drug Administration. "Antibacterial Soap? You Can Skip It, Use Plain Soap and Water." Updated 2024. https://www.fda.gov/consumers/consumer-updates/antibacterial-soap-you-can-skip-it-use-plain-soap-and-water
2. Caputo L. et al. "Laurus nobilis: Composition of Essential Oil and Its Biological Activities." Molecules, 2017. https://www.mdpi.com/1420-3049/22/6/930
3. Jaradat N. "Chromatography analysis ... of Laurus nobilis aromatic oil from Palestine." Chemical and Biological Technologies in Agriculture, 2023. https://link.springer.com/10.1186/s40538-023-00396-6
4. Türkmen M., Koçer O. "Variation of components in laurel (Laurus nobilis L.) fixed oil extracted by different methods." International Journal of Chemistry and Technology, 2021. https://openaccess.mku.edu.tr/items/33f7e399-2530-4ebe-b6c1-59db5670f418/full
5. Danby S.G. et al. "Effect of olive and sunflower seed oil on the adult skin barrier." Pediatric Dermatology, 2013. https://research.lstmed.ac.uk/en/publications/effect-of-olive-and-sunflower-seed-oil-on-the-adult-skin-barrier--2/
6. 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
7. 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
8. UNESCO. "Craftsmanship of Aleppo Ghar soap." 2024. https://ich.unesco.org/en/RL/craftsmanship-of-aleppo-ghar-soap-02132

This article is for general information and is not medical advice.