This analytical method assesses a person’s drug use historical past by inspecting the hair shaft. Segments of hair present a retrospective window, probably revealing substance consumption over an prolonged interval. As an illustration, a three-centimeter phase, analyzed from the basis, can sometimes supply a three-month historical past of drug publicity.
Its significance lies in its skill to offer an extended detection window in comparison with urine or blood assessments, usually proving invaluable in conditions the place a complete substance use timeline is required. Traditionally, this technique has been employed in varied authorized contexts, providing a extra goal and dependable evaluation than self-reported knowledge.
