Will A Hair Follicle Test Detect Marijuana?
let us see.....
Detailed Answer:
First how much marijuana use does there have to be to show up in the hair? I suspect moderate (2 cigarettes smoked entirely) would go into the hair.
Then how long does it stay in the system? Unless one is a HEAVY user, it is in the blood for maybe 2 days and in the urine for maybe 1 week. Probably less for both. With heavy continual use there is deposition in the fat. This is not that.
BUT the length of time it stays in the hair depends on the length of the hair. It grows at different rates in different people. I doubt there is no data on
http://blackgirllonghair.com/2015/11/3-ways-to-troubleshoot-natural-hair-that-wont-grow/
There is very high diversity in XXXXXXX XXXXXXX hair.
In general (white folk) hair growth is 1/2 an inch a month.
That is 7 months or about 3 to 4 inches. If the hair is longer, it will contain September if it is shorter it perhaps won't. You know your hair growth, literally you can judge better than I can.
The braids or dreadlocks is not a big issue on marijuana.
https://drugtestingnetwork.com/hair-testing
The false positive rate in hair is quite low and cross reaction with other drugs is overrated in hair (but not in dip stick testing which is far less accurate).