Hair test

EtG hair test: how far back does hair analysis look?

EtG in hair covers about a month per centimetre, up to around three months. Read how a hair test differs from CDT in blo...

Urine, saliva or hair: which drug test fits you?

Urine, saliva and hair each cover a different time window. Read which drug test fits your question.

How long do drugs stay detectable?

Detection windows per substance and per matrix (urine, blood, hair, saliva). With lab cut-offs, what shifts them, and wh...