I have been using this for nearly three years now. It's by far the best product out there for acid reflux. I have had acid reflux since 2002 and I wish I knew about this when I started noticing the tightness in my chest. It works better than Tums, Maalox or Zantac or any other chest pain acid reliever out there. It's very fast working and I highly recommend this product to anyone experiencing acid reflux. Before AbsorbAid, I had acid reflux at least three times a week, and I was always afraid of eating the "wrong" thing at any time of the day, but after discovering AbsorbAid I only have acid reflux maybe once every two or three months or so. It's amazing and I can't stress enough how greatly this product has worked.