What Is a Hair Follicle Test?
A hair follicle test is a highly reliable method used to detect past exposure to drugs, chemicals or toxins by analyzing hair growth over time. Because substances become embedded in the hair shaft as it grows, this test is widely used when long-term drug use or exposure history needs to be evaluated.
At The Carlson Company, hair follicle testing is conducted and interpreted by experienced forensic toxicologists, ensuring accurate, confidential, and court-admissible results.
How Does a Hair Follicle Drug Test Work?
Hair drug testing works by linking hair growth to exposure timelines. As substances circulate through the bloodstream, trace amounts can be incorporated into the hair follicle and remain there as the hair grows.
Unlike urine or saliva tests that detect recent use, a hair follicle drug test provides insight into drug use over an extended period, making it especially useful in legal, employment, and forensic cases.
Hair Follicle Test Accuracy Explained
Hair follicle test accuracy is considered among the highest for identifying historical drug use. Once drug metabolites are embedded within the hair shaft, they are protected from external contamination and routine washing.
At The Carlson Company, accuracy is supported through:
- Advanced laboratory analysis
- Strict chain of custody procedures
- Review by Ph.D.-level forensic toxicology experts
This ensures dependable results that clients and legal professionals can trust.
Hair Follicle Drug Test Process
The hair follicle drug test process involves collecting a small hair sample, typically from the scalp. When head hair is unavailable, body hair may be used as an alternative.
Samples are analyzed in a controlled laboratory environment to detect and confirm drug presence. Because of the technical nature of this testing, results should always be reviewed and explained by qualified forensic professionals like those at The Carlson Company.
Detection Window and Exposure Timeline
Hair follicle testing does not detect immediate drug use. Instead, it reflects exposure that occurred weeks to months prior, depending on hair length and growth rate.
This extended detection window makes hair testing ideal for:
- Legal and custody cases
- Workplace investigations
- Long-term drug use assessment
Hair Follicle Testing for Legal and Forensic Cases
Hair follicle testing for legal cases is often requested when:
- Drug history is disputed
- Long-term substance use must be documented
- Court-admissible lab reports are required
The Carlson Company provides professionally documented reports and expert consultation to support legal, forensic, and personal cases.
When Should You Consider a Hair Follicle Test?
You may want to consider hair follicle testing if:
- You need proof of long-term drug exposure or abstinence
- A legal or custody matter requires reliable evidence
- Workplace or personal concerns demand accurate results
If you’re unsure whether this test is right for your situation, The Carlson Company offers confidential guidance to help you choose the most appropriate testing option.
Book a Hair Follicle Drug Test with The Carlson Company
If you’re looking for accurate and confidential hair follicle testing, The Carlson Company is a trusted forensic laboratory serving individuals, employers, and legal professionals.
Court-admissible reports
Strict chain of custody
Nationwide sample submission
Expert toxicology support
📞 Call +1 866-889-3410 to discuss your case or schedule a hair follicle drug test.
