I am asked at least once a week this question. Before i answer , have you ever wondered WHY people ask this ? Probably not but its the key to it all .
Thing is testing is basically standardized meaning they should all be using the same cut off level . Well they dont .
Your sample will either have over the threshold amount or under and this creates positive or negative. So if they have same methods and cutoffs they should all be basically the same .
This is from quest and should be for EVERY LAB
Q: What testing methodology is used for hair drug tests?
A: A two-tiered testing process is used: 1. A portion of the hair specimen is screened using an Enzyme-Linked Immunosorbent Assay (ELISA)—a reliable and proven methodology for routine drug testing.
2. Any specimens that are preemptively positive in the screening process are then confirmed utilizing another portion of the hair specimen, with either gas chromatographymass spectrometry (GC-MS), gas chromatography-mass spectrometry/mas
you see how it says confirmation is done IF your positive ( over cut off on initial screen) first right?
Thing is we have to understand labs are a BUSINESS and they want people ( businesses) to use them over other labs. This is where marketing comes in and competition to get them customers.
Labs like quest and psychmedics are the biggest at this type of marketing. Claiming that they get more positives than other labs, claiming they have a super methods of doing this .
This is an example of that marketing from psychmedics
Is all hair testing alike?
No, Psychemedics uses its proprietary digestion method to remove virtually 100% of the drugs from the hair, thereby increasing detection capabilities. Other laboratories may leach drug from the hair, leaving behind or destroying some of the drug in the process. Psychemedics also employs an extensive wash procedure on test samples, and analyzes the wash to ensure that any potential contamination has been removed or taken into account. Other labs may use a less effective wash and/or do not analyze the wash, putting their clients at risk for making employment decisions based on a result that may be reflective of external contamination.
THE TRUTH ?
In reality they are just using a LOWER THRESHOLD in the case of cocaine for example most labs have initial screen at 500 however many labs not just psychmedics use 300pg which is the confirmation level for a 500pf initial screen likewise for THC initial screen cutoff is 1pg and some labs mainly quest and psychmedics have been caught ( we have the printouts on our reviews page) that show they skip the initial screen and use the confirmation which is ten times more sensitive .
when we do a Hair Razor Detox consultation we give you a treatment regimen for the average needed to get to the initial cut off level.
We have many who should have passed as the levels were under the initial screen level but are shown as positive based on confirmation level , but they never show you the actual initial screening thus admitting they cheated . So if your concerned you may get cheated by a lab youll want to go over what we suggest.
some examples below taken from article Quest psychmedics cheats testers to inflate positive results against Hair Razor Detox
So it is not that any one lab is harder to beat than another and not every lab probably does this every time . we have seen it done by most of them at one time or another. so in that regards they are the same.