The analysis of hair strands to identify the presence and levels of potentially toxic elements represents a non-invasive diagnostic technique. This method involves laboratory examination of hair samples to quantify concentrations of elements such as lead, mercury, arsenic, and cadmium. Results from this examination can then be used to assess an individual’s exposure to these substances.
Assessing elemental exposure offers several advantages. Notably, it provides a relatively long-term overview of exposure compared to blood or urine tests, reflecting accumulation over weeks or months. Historically, such analysis has been employed in environmental monitoring and occupational health settings, where chronic exposure is a concern. Furthermore, the ease of sample collection makes it a convenient option for widespread screening.