How sensitive to caffeine are you? I just had a cup of hot cocoa, which has less caffeine than decaf, and I feel dizzy and jittery. I have low thyroid but not horribly low thyroid. Can you just not have caffeine, or do you notice that you are really sensitive to caffeine too? I'm just wondering if this is a true link because cocoa has so many heart benefits and I just dont want to stop. I make my cocoa with pure ground cocoa (sugar free). So, I know I'm getting the good concentrated stuff but I'm hoping the caffeine wont make me have to stop.