Forget those pills because they are a waste of money and do nothing. All detox products "work" by dilution. That means the water is doing all the work. The water dilutes the THC metabolite concentration to where the sample falls below the cutoff limit of the screen.

You can duplicate the actions of those products at a fraction of the cost by following the guidelines outlined in the Dilution sticky thread.
Many of those detox products instruct you to drink more water than what is required in the Dilution guidelines, which certainly increases the chance of an overdiluted test result.

Bottom line is all detox products are a big scam to separate the credulous from their cash.

There is no product that can permanently rid the body of THC. Only time and fat-burning exercise can do that.