Quote Originally Posted by Cassiopiea
Hair tests can tell from six months ago. Althoug if you were that light a smoker I dont know, good luck.
Quote Originally Posted by partyguy420
it actualy all depends on how long your hair is... if its only an 1/8th on an inch long, it has shit from how ever long its been since your last hair cut... but if your hair is a foot long, it can tell you shit all the way back from yoour last hair cut...
Hair tests can detect the presence of drugs throughout the length of the hair. However, it becomes inaccurate after about the first 1 and 1/2 inches of hair from the scalp. This is about 3 months of growth. Because of this, the normally accepted standard in the U.S. is to only use the first 1 and 1/2 inches of growth and thus the last 3 months of possible drug use.