Hair & Nail Testing

When clinical, legal, or compliance decisions require a broader historical view of substance use, short detection windows are not enough.

Hair and nail testing provide extended detection capabilities — allowing providers to evaluate patterns of use over months rather than days. At Chemisys Laboratories, we offer advanced hair and nail drug testing using validated laboratory methodologies and forensic-level protocols to deliver reliable, defensible, and clinically actionable results.

Hair testing is the preferred method for long-term drug detection. As hair grows, drug metabolites circulating in the bloodstream become incorporated into the hair shaft, creating a chronological record of substance exposure. A standard 1.5-inch sample provides an approximate 90-day detection window.

Nail drug testing provides another powerful extended-detection matrix. As fingernails and toenails grow, drug metabolites become incorporated into the keratin structure — reflecting substance exposure over 3–6 months or longer.