. I took the crappiest coffee ever, put some of this in it let it sit in there for about a week or so before using. The change was day and night. It took all the bitterness out of the coffee and made it taste like expensive smooth good smelling coffee. I found it pretty easily at one of the big box specialty stores in the whole foods section. they also have it at healthstores. It was very affordable for the amount of product I got.