That guide is bunk and offers uninformed folks a false sense of security in thinking that the detox drink will actually rid the body of THC.

Besides, any articles and sources that label THC a "toxin" should be taken with a box of salt. THC is non-toxic, therefore it is erroneous to categorize THC as a "toxin".

ALL detox drinks work via the principle of dilution. That means they "work" because of the water that youre required by the instructions to drink with them. They do not rid the body of THC, as the peddlers and shills would like the consumer to believe. The only thing thats being accomplished is the diluting of the THCA concentration that is present in the bladder. This is the reason why a person can test negative on an assay after drinking copius amounts of fluids.
The effects of diluting, however, are only temporary - once the fluids ingested had all been voided out, the bladder is replenished with fresh THCA-laden urine and thus the donor is right back to square one.

You can duplicate the actions of those detox potions at a fraction of cost by following the steps outlined in N2's Dilution "sticky" thread.