Drugs will stay in the hair shaft until it either grows out or is cut off. Head hair needs to be cut, body hair does not. Men and women go to a stylist or barber to get their head hair cut and maintained on a regular basis.
Body hair is constantly growing and falling out at different rates - within a 6-12 month period. That is why you do not have to get body hair cut or trimmed like head hair.
Hair testing requires approximately 120-200 head hairs (thickness of a sharpie), or for body hair - the size of a large cotton ball.
Hair testing can go back weeks, months or years depending on the hair, time frame selected, or the location in which the specimen was collected.
Head hair can be broken down, or segmented into different time frames - where body hair or nail testing cannot.
Head hair - every 1/2 inch equals approximately 1 month. Standard detection time for a head hair test is approximately 90 days - minus the last 10-14 days. It takes approximately 10-14 days for any drug use to get into a person's hair or nails. It has to work its way through the body and out into the hair shaft or nail bed.
Standard detection time on body hair is approximately 6-12 months.
5 Panel Hair & Nail Testing
10 Panel Hair & Nail Testing
Other testing options available: