I can't say for sure as I have only been taking the tincture for less than 2 weeks, but what I will say is that I just did my 2nd flush this past Friday and I was much more successful this time around. The first time didn't produce any stones but the 2nd time I literally had hundreds of stones. The only change I made was taking Chinese Bitters and GCG so its possible the GCG dissolved the stones to make them small enough to pass.

Gallstones respond to herbal remedies and liver-flushing when they are immature cholesterol stones. The older they get the more difficult they are to remove by dissolving techniques and there come a time when they turn plastic in nature. Plastic cholesterol will not dissolve nor will will calcium gallstones. Some stones are composite consisting of hard and soft layers.

However, stones of any type tend to alter the biliary process and soft cholesterol stones form as well. Often these satellite stones cause the problems as they become mobile. Herbal remedies such as cold coin grass and Chanca Piedra, also dandelion roots and bets may help dissolve these satellite stones.

Calcium and other hard stones give less problems or even no problems without surrounding satellite cholesterol stones.

An interesting story in the Testimonials page at http://www.sensiblehealth.com
is the case of a man that passed big kidney stones just by taking the GCG tincture, with pictures shown of the stones and their sizes. Rather than being slowly dissolved these stones were simply pushed out while still huge. Whether they're the calcified type or not I can't tell but the pictures are there for anyone to see. Either crushed, softened or dissolved, the crucial point the story makes is that with GCG the process was pretty much painless. But remember there are several types of kidney stones, at least seven of them. The ones he passed were the painful, more urgent ones.
There's this herbal extract by Jon Barron called KGP Formula (www.baselinenutritionals.com) that includes stone-breakers Chanca piedra and Peppermint along with kidney cleansing herbs. The one testimonial on his site is from a woman who suffered acute kidney pain for years and for whom nothing had worked before taking the KGP. It's claimed that it resolves all types of stones in kidneys, gallbladder and pancreas, and it's used prior to Liver Flushes and referred to as the kidney flush. Can a small bottle of herbal extract that only lasts 5 days really double as both stone softener and kidney cleanse?...maybe these two processes are one and the same? Even the tincture form of GCG isn't supposed to be much of a kidney cleanser in the way the GCG tea is. Maybe extracts are stronger than tinctures. My guess is that any substance able to address calcified kidney stones will have the same action in the gallbladder or elsewhere.