The mini mun needed by the lab is a half inch , they will say they need 1.5 inches but that is just to get a longer window. at 1.5 inches they take 80 strands , at 1 inch its 100 strands and at .5 inches its 120 strands. they can not go past 90 days because it is regulated and all samples must be the same by weight. so 1 month min. 3 months max even if your hair is 5 feet long , trust me i have 7 years of of personal experience.
It is potentially possible to go back as far as the hair is long, whatever length of time the hair has been growing. Most Hair Drug Testing Labs only go back 90 days though. This is the time frame thought to be most accurate.
Some people say 6 months, a year, or the day you were born, which is not true.
The traces remain in the hair shaft until it falls out or you cut it off. Follow the link below for lots of details.
as long as it takes for your hair to grow out
about 30 days
it will stay in there for about 2 years
for 23 seconds.
90 days
Hair colour deposits into the hair follicle, it will grow out in time. It depends on how long you want you hair to be.
12 days wash your hair with tide.
Cpa made me take a test for taking clonazepam I take them on a daily basis for the past six months. Took one the night before air follicle and I only came out with marijuana in my system and I was also taking hydrocodones about give days prior.
approximately 3 months
Hair follicles can be used to test for the presence or past use of alcohol. Alcohol can stay in a hair follicle for up to 120 days.
Up to 3 years, depending on how often you smoke pot.
EVERYTHING stays on a hair test. Forever.