One Moroccan Sidr Honey Stops Bacteria at Startlingly Low Doses

• Sidr honey samples from five Moroccan regions varied widely in protein content, acidity, sugar levels, and other measured traits
• Honey from Zaggota showed the strongest antibacterial activity of the five, inhibiting bacteria such as E coli and Staphylococcus aureus at concentrations as low as about two hundredths of a percent
• Zaggota honey also had the highest measured protein content and among the strongest antioxidant readings
• Across all five samples, higher sugar content and lower acidity were linked to stronger antibacterial effects
• Samples with more protein tended to inhibit bacteria more effectively, suggesting protein may play a role beyond nutrition

Five jars of Sidr honey, each collected from a different corner of Morocco, sat side by side in a laboratory in Fez. One of them, gathered near Zaggota, needed almost nothing to stop bacteria from growing.

A laboratory study comparing Sidr honey (Ziziphus jujuba) from five Moroccan regions found that honey collected near Zaggota inhibited bacteria, including Staphylococcus aureus and Escherichia coli, at concentrations as low as about two hundredths of a percent, far lower than honey from the other four regions tested. The same Zaggota sample also carried the highest measured protein content and some of the strongest antioxidant readings among the five.

Researchers gathered honey from Errachidia, Zaggota, Ain Chair, Saka, and Khenifra, harvested in 2021 and 2022. Each sample was tested three separate times against seven bacterial strains, covering both gram positive and gram negative types, alongside measurements of protein, sugar, acidity, phenolic and flavonoid content, and antioxidant capacity.

The results point to something researchers have long suspected, that a honey's chemistry, not just its floral source, shapes how well it fights bacteria. Across the five samples, honey with more protein and lower acidity tended to inhibit bacteria more effectively, and higher phenolic content lined up with stronger antioxidant readings. That kind of variation between honeys carrying the same name is part of why measuring composition, rather than relying on a label alone, matters for understanding what a given jar of honey can actually do.

These results come from bacteria in petri dishes, not from people, so they say nothing yet about how Sidr honey might perform as a treatment in the body. Most of the honeys studied also came from a single harvest season, leaving open how much these differences hold from year to year or place to place within the same region.

It is a reminder that Sidr honey, the variety Tayab sources from beekeepers across Morocco, can differ considerably depending on exactly where it comes from, which is part of why verifying a honey's origin and composition matters as much as its name.