Hi Perna. You're the second person who has told me that coffee is not very dehydrating. Dang! I'm actually looking for a quicker route to being dehydrated....without exercise, of course (lol)....and I thought that coffee might speed up the process. I just want a quick, painless way to slip away from this hopeless existence. Not eating and drinking seems to take so long....the days last forever. I enjoy coffee, and I thought that drinking it might actually get me there quicker. I'm sorry that you may have hurt your heart due to your diet in your youth. I love my morning mug of coffee to get me going....but I don't have any "going" left to do. Still would like that coffee, though. Lol. Thanks for sharing with us. Take care.