Yes and No.How it wonu2019t workIf you intend to go with the internetu2019s recommended method of using vinegar as a same day solution, Iu2019m sorry, but thereu2019s a very high chance of failing the test.Sources that vouch for this method claim that by mixing a spoonful of vinegar in a glass of water, and then following it up with another gallon of water, acetic acid which is the main active ingredient in apple cider vinegar will work by masking the drug metabolites in the urine thereby allowing you to pass the test.While I wonu2019t openly oppose that, there isnu2019t any scientific evidence that shows that vinegar would really work this way.People who claim to pass using this method actually pass due to internal dilution. As I have explained in another question here, taking too much water blindly ahead of a test could lead to more problems since it leads to dilution of other important urine components including creatinine and specific gravity (I have explained the dilution method here).Donu2019t think of using vinegar as an adulterant either.According to this study, itu2019s true that adding vinegar directly into urine can lower its pH level and thereby lead to a false negative with EMIT Immunoassays.The major problem, however, is that vinegar shifts the pH outside the physiological range completely and you could be flagged for adulteration.How vinegar might help you pass a drug testThis study shows that taking vinegar over a few weeks can be effective in reducing body weight and fat mass.The ability to reduce fat mass means that vinegar can speed up the detoxification process by burning the fat cells containing drug metabolites.But this method requires a good amount of time- weeks or month. This means that it will only work for people who are trying to flush THC from their system and have enough time for this.Follow this link for a detailed article on whether apple cider vinegar can help in passing a urine drug test.