My mouth actually salivates and my tummy feels like it wants to vomit. I want to drink tea, for the health benefits but this side effect is not pleasant. I have always drank tons of black coffee, so I don’t believe its the caffeine. I did read somewhere it could be the tannins? Does anyone know what they are and why? I end up drinking a ton of water to make it go away or eat something even if not hungry…thanks.