"Honey, especially robinia, clover, and unprocessed raw honey, may improve.."
Scientific papers on the benefits of honey tend to be infomercials for the honey industry.
How do you figure it out? If the suggested "good" honey is limited to a specific geographic region. The local honey industry can benefit from the positive exposure. They don't do these informecials if the honey can be obtained from all over the world.
Where does the Robinia tree grow natively?