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Kirkland Pine nuts from China give bitter "pine mouth"
Steer clear of these pine nuts imported from China. They have been implicated as the cause of "pine mouth" a nasty bitter aftertaste that lasts for days or weeks after eating the nuts. Everything you eat has a nasty bitter aftertaste. My spouse and I both suffered symptoms after eating from a bag of Kirkland Pine nuts. I though I was sick but a search of the internet made the connection.
Pine nuts imported from China, like the Kirkland brand, may contain an inedible species, P.armandii. Here is a link to a scientific article on the topic from the "Journal of Toxicology"
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