I read a remarkable article in the newspaper a few days ago, I was wondering if anyone has ever experienced such a thing? It is at least something to pay attention to. Link: http://www.nrc.nl/achtergrond/article1157911.ece/Het_pijnboomraadsel Apparently quite a few people experience an alteration in their perception of taste, two days after eating pine tree seeds. All of a sudden everything what they eat will taste bitter, especially wine, tea and coffee become undrinkable. After five days the bitter tastes disappear and the perception is normalized. The delayed effect has been hard to explain, there is a fruit known that can change taste perception: the Synsepalum dulcificum. It makes sour food taste sweet, but the effect only lasts a couple of hours.