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Adulterants are added to urine, in order to interfere with the accuracy of drug tests. These adulterants are often oxidative in nature – hydrogen peroxide and bleach have been used, sometimes using pH-adjusting substances like vinegar or sodium bicarbonate. These can be detected by drug testing labs or you can buy bottles of adulteration test strips that can be purchased as an accessory for drug testing to assure urine specimen validity, but some less expensive tests do not test for them, so we make them available for you in bottles of 25.