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There are various methods employed in the lab tests which employment agencies depend upon.
, (including hair samples).
Many times , home test kits are doctored and therefore not reliable.
There is no guarantee that you will pass lab test , if home test is clean.
I hope the home test kit is authentic , of course I cannot comment about it. Detox kits and home testing kits are mostly money making products .
But there cannot be any generalisations here.
If the kit was genuine , than you should come off clean in the lab test.