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Viaguard Research Statistics. Urine, Saliva, and Blood Urine, Saliva and Blood Hair Sample or Nail Clippings Hair Sample or Nail Clippings Min Max Min Max Amphetamine (methamphetamine) 2 hours 24 hours 90 days 150 Barbiturates 4 hours 4-8 days 90 days 120 Benzodiazephines 4 hours 10 days 90 days 150 Marijuana (THC) 2 hours 8 days 90 days 180 Cocaine Metabolite … ................
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