Different people have different metabolism, and the time detection of different drugs varies as well. Sometimes the combination of the two does not play to the advantage of an individual.

- I got a question for you, and I hope you can answer it! I’ve been completely clean for full three month, ok? And I had a hair test last week, and I failed! How is that possible? I haven’t used anything at all, and they only test for three month back, and I don’t understand how I could fail!
- How long is your hair, and what kind of toxins are we talking about?
- My hair is down to my shoulders, and I’ve used cocaine and marijuana, and I passed for cocaine, but I failed for pot!
- Ok, here’s the thing – they do test you back  three months, but it is approximate. If your hair is longer than an inch and a half, they could have tested you for a bit longer then three months. Secondly, marijuana stays in your body for quite some time after you stop using it, while cocaine does not stay for too long. If you stopped smoking exactly three months ago, marijuana was in your system for at least another several weeks, and that got inside of your hair as well.
- I see…
- It is safe not to use any detox shampoos only for people who stopped well in advance before the test, for 5-6 month.
- Yeah, I guess I should’ve used a detox shampoo… Ok, thanks a lot!

Detox shampoo is designed to help you pass a hair test, and there is no reason why you should avoid the help of this wonderful product.