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The feedback we have received since this has happened, is that is you have only used 3 or 4 times in the past 90 days, with the shampoo, no matter where you go, you have 99% chance of passing. Which means that you cannot have ANYTHING in your hair to be able to pass. In the last few years, there are 4 labs that have lowered their cut-off to 0.01. Which means that you have to reach a certain level to be considered positive. The last thing I want to mention about hair testing, is that most labs have a cut-off. You don't want to chance re-contamination. We also recommend that you use a clean towel and comb/brush when you are done. It is very important that once you wash your hair with our product, that you do not use any styling products or hair styling tools, such as blow dryer.
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We offer a product called HFS, which is a masking agent that covers up the drug metabolites in your hair.
![pinner joints pinner joints](https://images.homedepot-static.com/productImages/ed592197-d318-4b3f-a64f-260099039023/svn/freeman-specialty-nailers-p4wws-64_1000.jpg)
On average, hair grows about 1/2" a month and a standard hair follicle test needs 1-1/2" of hair (which represents about 3 months) and it usually takes 3-7 days from the day you used, for the drugs to make there way into your hair follicle. Of course, once you cut your hair, then you are cutting away any drug metabolites that were in that section of hair. Once drug metabolites make there way into your hair, they are there FOREVER.