Ever eat something or brush your teeth after which everything tastes bitter or metallic? This phenomenon is called bitter taste syndrome and often occurs after certain eating foods or after brushing the teeth. The altered taste lasts anywhere from a few hours to a few weeks. Common food culprits include toothpaste, pine nuts, tomatoes, artichoke, pineapples, and certain medications. Not everybody experiences this problem which is felt to be due to misfiring of the sweet taste receptor…