I’m not sure anyone can give you a definite, unequivocal answer to this question. If you look on the internet, you will find lots of people who claim that Rescue Detox worked for them. However, lots of people make these same claims about niacin, vinegar, and cranberry juice, and those things definitely do not work.
I would say it’s worth a try, if you’re in a bind and you have no other option. THC takes a month to leave your system if you’ve been smoking every day (or almost every day) for months or more, and it takes about 2 weeks if you’ve been smoking every weekend for months or more. So if you do not have the luxury of waiting 2 to 4 weeks to get clean, you may want to try a detox drink.
I tried Herbal Clean once, and it worked for me. I also stopped smoking for 9 days prior, so I may have been clean naturally. But at the time, I had been smoking 2 to 3 times a day for several years, so I have trouble believing that I could really have gotten completely clean in 9 days.
I certainly would not believe the endorsements from random people on the internet who swear it worked for them. But neither would I trust unqualified opinions from people who just assume it doesn’t work, for no real reason, besides underlying personal biases.
I would not rely upon it to work. If you have enough time to get clean naturally, then abstain from using. But if you don’t have the option of getting clean naturally, then it might be worth a try.
Also remember that these drinks must be used as directed, in order to work. Follow the directions on the label. A lot of people who claim it doesn’t work also seem to have used it incorrectly (“I took it 2 days before the test and I failed” or “I took it 18 hours before the test and I failed” or “I took it 2 weeks before the test and failed”). You’re supposed to take it a few hours before the test, not days or weeks before. The drink is supposed to mask THC in your system. If you take it days before the test, then you will have peed it out long ago, and it will do you no good on the day of the test. FOLLOW THE DIRECTIONS CAREFULLY.