How long does it take from time of consumption for drugs to grow out into the hair shaft?
What are the different timeframes associated with hair testing? Every one-half inch (1/2″) of head hair is approximately equilavent to a thirty (30) day timeframe. Body hair yields an aproximate six (6) month timeframe. A standard hair test is 1 ½”, or 90 days, though longer time periods can be tested, depending on the length of the hair. Can I find out if a person used drugs on a month-by-month timeframe through hair testing? Yes, if you request the laboratory to segment the hair sample. Segmentation of hair must be specified on the chain-of-custody form. For example, if a client wishes to evaluate the last three (3) months for drug use but wants to evaluate each month separately, the following format should be written in the comments section on the chain-of-custody form: (0-30), (31-60), (61-90) The numbers refer to days in the month. If there is no timeframe specification reflected on the chain-of-custody for hair testing, the standard cut of 1 ½” is tested as a 90 day test. Is ther
