Yes, a drug test done on hair can go back as far as they cut, but typically they test the hair closest to the scalp which has the newest cells.
Yes.
The hair test depending on your hair lenght might reach beyond the year line.
hiar test are run at standard 3 month window , if hair i s 1" thats a 2 month window you cannot see a year into past when no material exist ( hair) to test with . so they can see up to 3 months unless hiar is shorter than 1.5" must be at least .5 " to run a test .
atleast 6 months to a year
Stealth is the process of being harder to detect. There is no past tense for stealth. Something is stealthy. Last year, that thing was stealthy.
He used to use a lot of wax in his hair but for the past year he's had his hair down
probably in a hair test but not in urine
Yes, doing a hair drug test they are going back Months, and can even test up to a year.
Yes there is a hair test they can do and find traces of drugs up to 3 years ago depending on the length of your hair.
If you know when you ovulated, some test on the market can detect the pregnancy hormone HCG fairly early. I have had a positive at 9 days past ovoulation or about 5 days before my period was due. It was light, but it was accurate. I have a 4 year old to prove it lol.
if you're talking about a hair strand drug test, my understanding is that marijuana can be detected in the strands of your hair for about a year.
They usually do for a 7 year timespan