Cause of Pine Mouth still unknown MAY 30 2012
According to a recent study, the cause of Pine Mouth (where eating pine nuts can make food taste horrible for days afterwards) is still unknown. The full text of the study is behind a paywall but The Awl has a short summary of the findings.
Now, a new publication by the Journal of Agricultural & Food Chemistry finds esteemed scientists literally throwing up their hands. They learned a lot about pine nuts and their composition! But nothing useful.