Hair care habits

J. Do Different Physical Classes of Hair and Hair Care Habits... 

Yes. A poor correlation between self-reported drug use histories of military members in drug treatment and the amount of drugs found in hair was observed when hair color was taken into account. The variability of drug incorporation along racial lines also has been observed by several other authors - for a limited population of individuals. Several variables such as hair texture and hair care habits could account for these differences. 

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