Drug testing is becoming increasingly common in many industries, including healthcare, transportation, and even education. Hair follicle testing is one of the most reliable ways to detect drug use, but how far back can it detect drug use? This article will answer all your questions about hair follicle testing and drug detection.
What Is Hair Follicle Testing?
Hair follicle testing is a type of drug test that uses a small sample of hair to detect the presence of drugs in the body. This type of drug test is preferred over other methods such as urine testing or saliva testing because it can detect drug use for a longer period of time and is less susceptible to cheating.
How Does Hair Follicle Testing Work?
The hair follicle drug test detects drug metabolites that have been deposited into the hair follicle by the bloodstream. The test involves taking a small sample of hair and analyzing it for drug use. The test can detect drugs such as marijuana, cocaine, opioids, and amphetamines.
Step by Step Procedure of Hair Follicle Test
- The hair sample is collected from the head, usually from the crown area.
- The sample is cut close to the scalp and is usually about 1.5 inches long.
- The sample is packaged and sent to the lab for testing.
- The lab uses a process called gas chromatography-mass spectrometry (GC-MS) to detect drug metabolites in the hair sample.
- The results are usually available within a few days.
How Far Back Can Hair Follicle Testing Detect Drug Use?
Hair follicle testing can detect drug use for up to 90 days. This is because drugs that are ingested are metabolized and deposited into the hair follicle by the bloodstream. As the hair grows, the drug metabolites remain in the hair, creating a chronological record of drug use.
How Far Back Can Specific Drugs Be Detected?
| Drug | Time Period |
|---|---|
| Marijuana | Up to 90 days |
| Cocaine | Up to 90 days |
| Opioids (Codeine, Morphine, Heroin) | Up to 90 days |
| Amphetamines (Methamphetamine, Ecstasy) | Up to 90 days |
Why Is Hair Follicle Testing Preferred Over Other Methods?
Hair follicle testing is preferred over other methods of drug testing because it has several advantages:
- It can detect drug use for a longer period of time.
- It is less susceptible to cheating since the hair must be cut from the head.
- It is less invasive than urine or blood testing.
- It can detect a wider range of drugs.
Is Hair Follicle Testing Accurate?
Hair follicle testing is considered to be one of the most accurate forms of drug testing. The test has a low rate of false positives and is not affected by external factors such as diet, exercise, or medication. However, there are some rare instances where external factors such as hair treatments or exposure to second-hand smoke can affect the test results.
How Can I Pass A Hair Follicle Test?
There is no guaranteed way to pass a hair follicle test if you have used drugs. Attempting to alter the hair sample by bleaching, dying or shampooing will not work as the drug metabolites are deposited inside the hair shaft. The best way to pass a hair follicle test is to abstain from drug use for at least 90 days before the test.
How To Prepare Yourself For The Hair Follicle Test?
- Do not use any drugs for at least 90 days before the test.
- Do not bleach or dye your hair before the test as it can affect the test results.
- Make sure your hair is clean and free of any hair products.
Conclusion
Hair follicle testing is a reliable way to detect drug use for up to 90 days. This type of drug testing is preferred over other methods because it is less susceptible to cheating and can detect a wider range of drugs. If you are required to take a hair follicle test, the best way to pass is to abstain from drug use for at least 90 days before the test. Remember, drug use can have serious consequences and it’s always better to be safe than sorry.
Commonly Asked Questions and Their Answers
-
Q: Can hair follicle testing detect alcohol use?
A: No, hair follicle testing cannot detect alcohol use. -
Q: Can second-hand smoke affect the hair follicle test results?
A: No, second-hand smoke cannot affect the hair follicle test results. -
Q: How long does it take for the hair sample to grow to a detectable length?
A: It takes approximately 5-10 days for the hair sample to grow to a detectable length.
References
- https://www.verywellmind.com/hair-follicle-drug-tests-67774
- https://www.medicalnewstoday.com/articles/323830
- https://www.healthline.com/health/hair-follicle-drug-test#accuracy