The time period for hair analysis depends on the length. Hair grows at about 1cm per month, so 1cm long hair will got back 1 month, the 2cm closest to the scalp will go back 2 months etc. To go back 6months you need 6cm long hair. You might find that it will be difficult to discretely snip off enough hair for analysis and you also want it to be taken from as close to the scalp as possible. Any hair treatments could also ruin the analysis such as if the hair has been heat treated, bleached etc.
hair analysis tests as far back as 6 months
You and your daughter are in my prayers
Oh my gosh, an 11 year old doing heroin??? Wow! I didn't even know what drugs were at that age. I'm praying for you and your daughter!!! She is just a child. Are any of her friends a bad influence on her? I just have no idea what I would do if I was in that situation. My only son is 4 years old, thank God! I don't know what the world is coming to now a days! I wish you the best of luck!