Mann Lake sells a product called Super DFM-Honeybee.  It is claimed to have multiple benefits including:
"Safe bacteria designed to help the honeybee suppress pathogens
Establish beneficial microflora
Helps increase bee colony health
May help inhibit chalkbrood (Ascophera apis)
Microflora have a positive effect on vitellogenin (fat body) formation (The health of honey bee colony is dependent upon vitellogenin reserves of the nurse bees) Yeasts help synthesize B-vitamins needed for bee health."
https://www.mannlakeltd.com/media/wysiwyg/pdfs/SDFM_2016.pdf
Does anyone know of any evidence based studies as to its effectiveness in any of these areas?
Brion

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