Thiazide diuretics are on the World Anti Doping Agency's, as well as the International Olympic Committee, list of banned substances due to it ability to mask illegal substances in urine. The rapid expulsion of water from the body helps to achieve this. Additionally, with Thiazide diuretics blood levels decrease. The hair follicle is fed by blood, sweat, and sebum. Will the body's inability to retain or reabsorb water and decreased blood level prevent substances from being deposited into the hair cortex?