When your bodies bacteria is out
of balance you can get an overgrowth
of yeast and it could cause you have poor digestion, which intern gives you a bad taste. Try going on a strict diet for a few weeks and add a good refrigerated probiotic. Do not eat any sugary foods or drinks, do not eat pasta, bread or rice until the bad taste goes away. The carbohydrates that you should avoid will feed that bad bacteria (yeast) and cause you to get worse if you don't nip this in the bud.