On Fri, Mar 9, 2018 at 11:36 AM, Peter Loring Borst  wrote:

> Hi all
> Propolis has been used and studied for a very long time. While some
> suggest that it may be a powerful medicine, nobody has really shown that it
> is.
>
> Kujumgiev, A., et al. "Antibacterial, antifungal and antiviral activity of
> propolis of different geographic origin." Journal of ethnopharmacology 64.3
> (1999): 235-240


Much water under the river since 1999 ...
https://www.hindawi.com/journals/ecam/2015/206439/
Review Article
Propolis: A Complex Natural Product with a Plethora of Biological
Activities That Can Be Explored for Drug Development

but still I haven't been able to find one study of feeding propolis to bees
...

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