An 8.8-ounce bottle of high-grade manuka honey costs about $75 from Costco, while three 24-ounce bottles of Costco ... be sure to look for a trademark known as UMF™, which means that the ...

In response to this discovery, jars of manuka honey began to be marketed bearing a UMF number – "Unique Manuka Factor" – relating to how many bacteria the honey could kill once the hydrogen ...