Joined: May 2012
Posts: 383
Apparently a large amount of Manuka honey being sold is low grade, doesn't contain any of the unique properties, adulterated, or even outright counterfeit, based on testing.
UMF (Unique Manuka Factor) is the industry standard rating system.
"UMF is an internationally registered trademark that can be used only by licensed users who meet set criteria which include auditing and monitoring to ensure the product is natural, unadulterated, Manuka honey that has the unique non-peroxide antibacterial activity and is true-to-label claim".
A UMF of at least 10 is required to be considered "Active Manuka honey"
Looking at prices on various websites, expect to pay anywhere between $50 to $150 for 500g of honey with UMF between 10 - 28.