Laurus nobilis
Traditional Aleppo soap is made with olive oil, laurel berry oil (zeit ghar), water and lye, while the relative concentration of laurel oil (typically 2–20%) determines the quality and cost of the soap. "Laurus nobilis", from which the berries come, is categorized as an "underutilized species". As it is produced only from natural oils, Aleppo soap is also biodegradable.