What is HMF in honey and how can it be controlled

Honey is a product that does not withstand heat well: when heated, it begins to lose its properties. The simplest way to detect that honey has been heated is to measure the presence of Hydroxymethylfurfural or HMF, a compound that appears in honey when it is heated. One of the least recommended practices in beekeeping is heating honey, as doing so at temperatures above 40º causes it to lose its exceptional qualities. However, it is common for honey to undergo thermal treatments, especially in more industrial honey.