I was taking the 1000 mg pills but they were like Horse pills, so large and hard to swallow,,, I decided to go with this and double it up, so I take 2 a day. I am very pleased and have now set this on autoship so I won't run out. Oh, about the product itself? Well, I have copd and this helps to clear out my lungs,,,I also no longer have Angina attacks when I am on this. Once in awhile in the past, I had ran out of pills,, for like a week. I not only was majorly congested, but my Angina attacks were scary and I wanted to go to the er but I had to keep reminding myself that it was Angina,,, and to get more of this pill. I will NEVER ever go without again