It is called cacogeusia, in this case metallogeusia (metallic and bitter), the unpleasant taste sensation. It is often associated with psychological-psychiatric disorders and should not be confused (until proven otherwise) with the classic "bitter mouth" of digestive disorders (biliary lithiasis, hiatal hernia, gastritis, reflux, gastric tumor, peptic ulcer, etc.).
It seems that in some subjects, the ingestion of pine nuts can induce, at a distance of about 24 hours (outside the time affected by digestion), this symptom increasing up to 48 after exposure. However, in the 2010 publication entitled " Pine mouth" syndrome: cacogeusia following ingestion of pine nuts (Genus: pinus). An emerging problem? ”, A progressive and spontaneous improvement was also documented up to the total disappearance of the metallogeusia within 5 days of ingestion.
What may have seemed a single case, however, proved to be a "pilot" episode, as both the search engine statistics and the number of online reports increased rapidly and dramatically. Translated literally from English, this disorder has been baptized by the profane "Bocca di Pino" and, from the data collected, it seems that it can remain even up to 15 days after ingestion. Some have also reported nausea, vomiting and abdominal cramps; however, if it is now proven that the pine nuts (raw, cooked and of any species) are related to this reaction, the mechanism of action is still completely unknown.
It is therefore possible that metallogeusia caused by the ingestion of pine nuts is a problem, although relatively serious, emerging and rapidly spreading.
