If you can be drug test from a strand of your hair, what else can they check for using your hair?

like diet or diseases?

If you can be drug test from a strand of your hair, what else can they check for using your hair?

They can find out if your realie a tuer blnde

If you can be drug test from a strand of your hair, what else can they check for using your hair?

Head Lice or your DNA.