Morocco's Zantaz Honey Fights Drug Resistant Bacteria in Lab Tests

• In lab tests, honey from Morocco's Zantaz variety stopped and killed three antibiotic resistant bacteria, including a vancomycin resistant strain of Staphylococcus aureus.
• Staphylococcus aureus was the most vulnerable of the three bacteria tested, needing the lowest average concentration of honey, while Escherichia coli needed close to double that amount.
• Methyl syringate, the honey's most abundant polyphenol, along with melanoidins, natural acidity, and several minerals, tracked closely with stronger antibacterial effects.
• Potassium and calcium were the honey's most abundant minerals, and most minerals measured lined up with stronger antibacterial activity.
• Researchers confirmed the botanical origin of all ten honey samples through pollen analysis before testing.

In a laboratory in Fez, honey made from a spiny mountain shrub stopped a strain of Staphylococcus aureus that resists vancomycin, an antibiotic doctors often turn to when other drugs fail.

A laboratory study tested ten samples of Zantaz honey, a monofloral honey gathered from the flowering shrub Bupleurum spinosum in Morocco's Middle Atlas Mountains, against three bacterial strains resistant to multiple common antibiotics and isolated from patients at a Fez hospital. Staphylococcus aureus proved the most vulnerable, needing on average 112.5 milligrams of honey per milliliter to both stop its growth and kill it outright, the lowest amount of the three species tested. Escherichia coli was the toughest to treat, needing close to double that concentration on average, while Pseudomonas aeruginosa fell in between.

Researchers first confirmed each sample's botanical origin by counting pollen grains under a microscope, since more than half the pollen in every sample had to come from Bupleurum spinosum to qualify as Zantaz honey. They then diluted the honey across a range of concentrations and used a color changing dye to measure the minimum amount needed to halt bacterial growth and the minimum amount needed to kill the bacteria outright, a standard pair of measurements in microbiology known as MIC and MBC.

The findings add to a small but growing body of research suggesting some honeys carry measurable antibacterial power of their own, at a time when bacteria resistant to standard antibiotics are becoming harder to treat. Statistical analysis pointed to specific compounds behind the effect. Methyl syringate, by far the honey's most abundant polyphenol, tracked closely with stronger antibacterial activity, alongside melanoidins, natural acidity, and several minerals including potassium and calcium, the two most abundant minerals found in the honey. That pattern fits a broader idea taking hold in honey science: what a honey is made of, not just where it comes from, appears to shape how bioactive it actually is.

None of this was tested in a living organism or an actual infection, and the concentrations that worked in petri dishes are far higher than what anyone would encounter eating a spoonful of honey. The associations between specific compounds and antibacterial strength come from statistical modeling, not proof that any single compound is responsible on its own.

Zantaz is one of the monofloral honey varieties Tayab sources from beekeepers across Morocco, each batch traced back to the hives where the bees fed.