Yes, 1.5 inches covers a period of approximately 90 days .Basiclly
hair on the head grows on the average of approx 1/2 inch per month so it
takes about a half inch of hair for every 1 month of usage but growth rate varies among people with approx 0.8 inches per month which can create a possible time variation of up to 1 week per month. !!!! The growth rates for body hair are slower than the hair from your head. Most body hair is replaced in about one year. So substances may be detected in body hair for up to 1 year .Also its best to count
90 days after the substance left the blood stream not the last time you use.
hair on the head grows on the average of approx 1/2 inch per month so it
takes about a half inch of hair for every 1 month of usage but growth rate varies among people with approx 0.8 inches per month which can create a possible time variation of up to 1 week per month. !!!! The growth rates for body hair are slower than the hair from your head. Most body hair is replaced in about one year. So substances may be detected in body hair for up to 1 year .Also its best to count
90 days after the substance left the blood stream not the last time you use.
