I can also tell you from my own experience with the Clark Liver Flush, that each successive flush pushes me to a higher level of health. In other words, the benefits continue to increase with each flush.
Here's my curezone post from 2002 which shows how I was able to measure physical health improvements:
Although I have been visiting this forum for a limited time, I have noted that few people have been able to quantify their improvements. Most say they feel better, have more energy, or they say have been able to avoid surgery. Some even wonder if it is the mere thought that they have eliminated these seemingly foreign objects from their bodies, that has created the feeling of improved health. I can go into a long explanation of what I have observed and experienced regarding my own health over the last 10 years leading up to the discovery of these flushes, but I will simplify by just presenting my quantitative Liver Flush results.
In an attempt to improve my health, I took up running after having my gall bladder out nearly five years ago. Each time I run, I measure my distance and pace (minutes/mile) I have settled on 5 miles, 3 to 4 times per week and I run the same course most of the time. Each time I run, I push myself to my physical limit, trying to run faster than I did the time before. Although I have had ups and downs in terms of speed, I have never recorded a shift in speed and energy like that which occurred following the liver flushes.
During the month of August, my average speed was 7:05 per mile. During the month of September my pace dropped to 7:08 per mile. For the first four runs in October, my pace further dropped to 7:27 per mile, and I had to shorten three of the four runs from five down to four miles due to lack of energy. I had contemplated trying a Liver Flush for some time for a number of reasons and decided that this was now the time.
I performed my first Liver Flush on October 4th, and on October 10th, six days later, I ran my five mile course at a 6:31 pace. this was not a course record for me, but given my recent history, this was relatively fast. My pace gradually slipped back to 6:50 per mile and I performed my second flush on October 18th. On October 25th, seven days later, I ran a 6:26 pace slipping back on each subsequent run to 6:42 before performing my third flush on October 31st. On November 4th I ran a 6:28 pace, on the 5th, I ran a course personal record at a 6:22 pace. Two days later on the 7th, I broke my personal record again by running the 5 miles at a 6:20 pace. Once again, in the subsequent days my pace slipped back to 6:45 per mile. I performed my 4th flush on November 14th and on the 18th I broke another personal record by running at a 6:16 pace. On the 20th, I ran at a 6:21 pace. I was so excited with this new energy level that I decided to shorten the two week cycle of flushes. I performed my next flush on November 21st and my pace has now slipped to the 6:30 - 6:45 level. I attribute this to breaking the 2 week flush cycle. My running pace was showing that my liver definitely achieved peak performance about 5-7 days after a flush as long as they were spaced two weeks apart.
Those were a lot of numbers to throw around but to summarize, my average pace over 20 runs since the first flush has been 6:33 per mile vs. 7:09 per mile for the 26 runs immediately prior to the flushes. Had I not had this measuring stick, I would have simply said that I feel better from the flushes.
Since I still produced a lot of stones out my gall-bladderless liver after the 5th flush, I suspect I have not yet reached my peak. Since liver function is absolutely critical to running efficiency, I probably won't reach my peak until I am producing no more stones, and until my liver has had a chance to heal. I imagine that proper bile flow is probably a key to efficient conversion of carbohydrates for fuel.
I have now flushed for the 6th time. I'll see what happens on this weeks runs. As I said, my system reaches its peak just 5-7 days after flushing.