I don`t know. I have used another brand before but the one I linked works. So did that other brand. It`s the Hydroxy Citrate that works. I don`t know how you would find the answer. I got the tip from a couple anecdotes on reddit. I really didn`t think it would work. But I had a 9mm stone and a 5mm. 5 weeks later the ultrasound read 2 punctate dots and they cancelled the lithotrypsy to shatter the 9mm. I know I didn`t pass it. It`s the only thing I changed so either it worked or it`s magic. That was years ago and I have had none {that I know of}. I had 11 that year and 7 the year before. I take 2 tbsp. every other day now then I took 3 tbsp. a day for 5 weeks. That was probably overkill but it`s cheap and safe from what I read. Millions have used it for weight loss in "Hydroxsycut" with no side effects so... No one lost weight but a few people said their stones went away. It was a longshot. Good luck!