I've used them, the directions need to be followed perfect, I hear a lot of people say the drinks are bull shit but they have worked for me twice, this is absolutely a fact, they will not I repeat will not work for methamphetamine. They sometimes bust out with real heavy pot smokers and also people who are over weight. Also if you consume fast food and other poisonous shit your body might not be burning fat normally, it depends I guess but on a healthy adult those drinks are legit. The best way is to enjoy herbs beautiful effects responsibly and then will be clean within 2-7 days opposed to the 31+ days it takes a lazy burn out pothead to get clean. Much love and respect, no fear and be safe.