Folks will often ask us for info on coffee that has less acidity because they have a real problem with that and their GI tract. So when we visited Edwin Martinez at Hario USA, we posed this question to him because we figured that someone with his extensive end-to-end knowledge of the coffee world might have some good recommendations.
What we learned was that it might just be that folks are working under the misconception that bitterness is the flavor of acidity. In this video Edwin talks about acidity vs. bitterness — and how the culprit may also be rancid coffee oils. Yeech.