3 doctors weighed in:

How does drug testing using hair works?

3 doctors weighed in
Dr. Dan Fisher
Internal Medicine
2 doctors agree

In brief: Hair tells all.

Drugs and their metabolites are incorporated into your hair as it grows out.
Simple chemical analysis can identify residues and reconstruct your history of ingestion.

In brief: Hair tells all.

Drugs and their metabolites are incorporated into your hair as it grows out.
Simple chemical analysis can identify residues and reconstruct your history of ingestion.
Dr. Dan Fisher
Dr. Dan Fisher
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