In November, across the hillsides of the Levant, workers beat the branches of Laurus nobilis trees with long poles. Below the branches, nets catch the falling fruit — dark purple berries the size of small olives. These berries are pressed. The thick, dark green oil that flows from them smells immediately medicinal: earthy, resinous, slightly camphor-like, with something that registers in the nervous system as purposeful.
This is laurel berry oil — the ingredient that transforms an olive oil soap into Aleppo soap. And the compounds responsible for that distinctive scent are the same compounds that give it medicinal properties that Syrian Sabonji masters understood empirically long before analytical chemistry existed to explain them.
Lauric acid: the antibacterial backbone
The dominant fatty acid in laurel berry oil is lauric acid — present at twenty-five to forty percent depending on the berry source and pressing method. Lauric acid has a specific, well-documented mechanism of antibacterial action: it disrupts gram-positive bacterial cell membranes, causing cell lysis and death.
Against Cutibacterium acnes (acne), Corynebacterium and Staphylococcus species (body odour, wound infection), and various skin surface bacteria, lauric acid has demonstrated activity in multiple laboratory studies. Significantly, it shows activity against C. acnes comparable to benzoyl peroxide in some comparisons, with dramatically lower rates of skin irritation.
Linalool: anti-inflammatory and antifungal
Linalool is a monoterpene alcohol present in laurel oil at five to fifteen percent. It is also found in lavender, coriander, and hundreds of other plants — but in laurel it is concentrated alongside complementary active compounds that amplify its effects.
Linalool has demonstrated anti-inflammatory activity through inhibition of inflammatory cytokines — the chemical signals that drive conditions like eczema, psoriasis, and acne. It also has antifungal activity against Candida species and Malassezia, the dandruff-associated scalp yeast.
In cosmetic applications, linalool is regulated as a potential allergen at high concentrations — this is a consideration for people with fragrance sensitivity who encounter it in synthetic fragrance blends. In the context of laurel oil in Aleppo soap, the concentration is typically below the threshold that triggers reactions in all but the most sensitive individuals.
1,8-Cineole (eucalyptol): antimicrobial and penetration enhancer
1,8-cineole is immediately recognisable by scent — it is the compound responsible for the clean, slightly camphor-like note in eucalyptus. In laurel oil, it constitutes five to twenty percent of the composition. It has broad-spectrum antimicrobial properties against both bacteria and fungi, and uniquely, it functions as a skin penetration enhancer — increasing the permeability of the skin's outer layer to other active compounds applied simultaneously. This means lauric acid and linalool penetrate more deeply into follicles and pores when 1,8-cineole is present alongside them.
Beta-pinene and terpinyl acetate: supporting players
Beta-pinene (antiseptic, antimicrobial) and alpha-terpinyl acetate (antifungal) round out the compound profile. Their concentrations in laurel oil are lower than the compounds above, but their presence broadens the scope of antimicrobial activity — making it harder for any single organism to develop resistance to the oil's overall effect.
How the compounds work together
The multi-compound antifungal and antibacterial action of laurel oil is a meaningful advantage over single-molecule pharmaceutical actives. Malassezia that develops relative resistance to zinc pyrithione still faces a multi-point attack from laurel oil's compound combination. This is one reason regular users report that laurel oil products maintain their efficacy over time in a way that medicated shampoos do not.
What this means for Avlia's bars
Every Avlia bar delivers these compounds at a concentration determined by its laurel oil percentage. The Avlia 5% Bar delivers a trace. The Avlia 75% Bar delivers them at maximum concentration. Between these points, every percentage represents a precise, calibrated dose.
The earthy, herbal scent that intensifies with higher-percentage Avlia bars? That is the smell of these compounds — the same smell that has signalled quality and authenticity in Aleppo soap for two thousand years.
Find the Avlia laurel oil range at avliahome.com. Made by Syrian Sabonji artisans in Turkey.