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Consensus on alcohol markers in hair analysis by Society of Hair Testing.
| Total Abstinence | Chronic Excessive Consumption | Hair segment | |
|---|---|---|---|
| EtG | <7 pg/mg | ≥30 pg/mg | proximal scalp hair segment up to 6 cm |
| FAEEs | <0.12ng/mg | ≥0.35 ng/mg | 0-3 cm proximal scalp hair segment |
| <0.15ng/mg | ≥0.45 ng/mg | 0-6 cm proximal scalp hair segment |
