Much like us bees forage for foreign food. Much like us they suffer from indigestion from such food.
Consequently the scientists have advised us that for bees to remain healthy they must refrain from feeding on exotic flowers from China and Mexico.
So just as we have to rely on gut instinct to avoid a gut upset the same applies to bees.
Bees are as natural an animal as nature intended. We should ensure they stay that way.
[See: Ecology and Evolution: April 2018]