The Truth About Hair Drug Tests: Can They Detect One-Time Use?

Thinking about a hair drug test and wondering if it can detect a one-time use? Hair follicle drug tests are popular because they offer a longer detection window than urine or blood tests. In this blog, we'll break down the ins and outs of hair drug tests, their benefits, what they can detect, and their limitations, so you can choose the best drug testing method for your needs.

And if you're in need of drug testing services, whether personal or for business, Health Street has you covered. Register online or call us at (888) 378-2499.

Diana Vaculova
Published on

Register Now

Hair Follicle Drug Tests Explained

A hair drug test works by analyzing a small hair sample to detect illicit drugs in the system. This type of drug test is usually chosen when people need a longer detection window. Drugs metabolized by the body are deposited into hair follicles through the bloodstream as hair grows, allowing these substances to stay in the hair for up to 90 days or even longer. This makes hair tests ideal for detecting regular drug use over a prolonged period.

What drugs can be detected through hair drug tests?

Hair follicle drug tests can identify a wide range of substances, depending on the type of panel that is selected. The higher the number of the panel, the more substances are tested.

Hair vs. Urine Drug Test

The main difference between urine and hair drug tests is the detection window, as hair follicle drug tests can distinguish drug use for a much longer period. However, urine drug tests are more affordable, and the results are available quicker than hair follicle drug test results. Urine drug tests are meant to identify recent use, while hair drug tests are used to provide a historical view of drug use over several months.

Can Hair Drug Tests Identify One-Time Use?

The simple answer is yes. However, the frequency, amount, and timeframe in which the person used drugs can affect the outcome of the hair follicle drug test. Hair tests have a limitation, they can't detect recent drug use until roughly five days after exposure. This is because new hair needs to grow in order to detect drug use. For very recent use, a urine test is more effective.

Can the drug test identify the date of drug use?

Hair follicle tests can't pinpoint the exact date or time of drug use.

Illustration of factors affecting hair drug test lookback period, including type and amount of drugs, metabolism, and age.

Choose Health Street as Your Hair Drug Testing Partner

Health Street offers a wide variety of hair follicle drug testing options to fit your specific needs. We provide reliable and accurate drug testing services and deliver the results through a confidential, secure online portal. To learn more about hair follicle drug tests, register online or give us a call.

Frequently Asked Questions

What if a person has no hair on their head?

Hair can be collected from other body parts. If a person does not have hair, urine testing may be considered.

How much does a hair drug test cost?

The price can vary depending on the type of hair drug test, but is generally higher than urine tests due to the specialized equipment and analysis required.

What if my question wasn't answered?

Try taking a look at our Hair Drug Testing page or our Drug Testing FAQ page. If you still can't find an answer, we are happy to help via phone.

Citations

menu_book
Palamar, J. J., & Salomone, A. (2023, January 2). On the challenges of hair testing to detect underreported substance use in research settings. The American journal of drug and alcohol abuse. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10026183/
menu_book
MediLexicon International. (n.d.). Hair follicle drug test: How it works, what to expect, and accuracy. Medical News Today. https://www.medicalnewstoday.com/articles/325013
Diana Vaculova
WRITTEN BY

Diana Vaculova
WRITTEN BY

Drug Testing
FEATURED IN

Drug Testing

Read Health Street's dramatic and informative drug testing stories.

Drug Testing
FEATURED IN

Drug Testing

Health Street - Related Blog Posts

Continue Reading. Related Health Street articles.

Explore more blog posts from Health Street's knowledgeable authors.