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American Screening Corporation

Rapid Testing And Drug Testing

Blog posts March 2023

Hair Follicle Drug Test

A hair follicle drug test requires a sample of head hair, which needs to be at least 1.5 inches long and have the thickness of a pencil. It cannot be collected from a brush or other source. Body hair can be used instead of head hair if it is short or shaved. Body hair grows slower than head hair, of…

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