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  2. Cannabis drug testing - Wikipedia

    en.wikipedia.org/wiki/Cannabis_drug_testing

    If an individual's hair is shorter than 1.5 inches, this detection period will be shorter. The detection window for body hair cannabis testing will be longer, because body hair grows slower than head hair and distorts the detection timeframe. Hair drug testing measures the marijuana parent metabolite embedded inside the hairshaft and eliminates ...

  3. Drug test - Wikipedia

    en.wikipedia.org/wiki/Drug_test

    The chart depicts the longer detection times of the metabolites. In the case of hair testing, the metabolytes are permanently embedded into hair, and the detection time is determined by the length of the hair sample used in the analysis. The standard length of head hair used in the test is 1.5", which corresponds to about 3 months.

  4. Hair analysis - Wikipedia

    en.wikipedia.org/wiki/Hair_analysis

    Chemical hair analysis is used for the detection of many therapeutic drugs and recreational drugs, including cocaine, heroin, benzodiazepines and amphetamines. [3] [4] Hair analysis is less invasive than a blood test, if not quite as universally applicable. In this context, it has been reliably used to determine compliance with therapeutic drug ...

  5. Hair type chart: How to find your hair type, from straight 1A ...

    www.aol.com/lifestyle/hair-type-chart-hair-type...

    The original hair type chart, also known as the hair typing system, was created by Andre Walker, Oprah Winfrey's hairstylist, in the 1990s. He debuted the system on Winfrey's show to promote his ...

  6. Ketoconazole Shampoo for Hair Loss: Does It Work?

    www.aol.com/ketoconazole-shampoo-hair-loss-does...

    Both treatments increased hair density and size, and the amount of anagen hair follicles (hair follicles in the growth phase of the hair growth cycle). Another small study from 2011 examined 15 ...

  7. Duquenois–Levine reagent - Wikipedia

    en.wikipedia.org/wiki/Duquenois–Levine_reagent

    The authors themselves reported that the D–L test gave false positives, but declared the D–L test confirmatory when combined with the presence of cystolithic hairs, which marijuana plants possess. However, many plant species have such hairs, and the study only confirmed that 82 of them did not give D–L test false positives.

  8. How Long Does Finasteride Take to Work? - AOL

    www.aol.com/long-does-finasteride-125800540.html

    When it comes to hair loss, DHT binds to receptors in the scalp and causes hair follicle miniaturization. This means it shortens the anagen phase (or growth phase) of the hair growth cycle .

  9. Forensic toxicology - Wikipedia

    en.wikipedia.org/wiki/Forensic_toxicology

    Head hair grows at rate of approximately 1 to 1.5 cm a month, and so cross sections from different sections of the follicle can give estimates as to when a substance was ingested. Testing for drugs in hair is not standard throughout the population. The darker and coarser the hair the more drug that will be found in the hair.

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