Driving licence

Proving alcohol use: what CDT, EtG and a blood test show

CDT looks back two to three weeks, EtG in hair up to about three months. Read what each alcohol marker measures and whic...

CDT value and your driving licence: what the CBR investigation involves

For alcohol, the CBR looks at gamma-GT, CDT and MCV together. Read which blood values count and how far back CDT looks.