>
> >how can we make blanket assumptions or assume that some samples might not
> be dangerous?
>

Excellent point, Allen.  In some areas, propolis is gathered mainly from
single species of plants (e.g. the green propolis in Brazil from
Baccharis).  So no reason to assume that bees couldn't be gathering a
propolis that is toxic to humans (they can certainly gather honeys that are
toxic to humans).

On this subject, one thing that I found interesting at Apimondia is the
large number of veterinary studies on propolis (in fact, Juanse's wife
Alejandra, uses it extensively in her veterinary practice).  Animals may be
less prone to the placebo effect, so I view these studies with interest.
-- 
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com

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