What would cause a false positive on a 5 panel urine test? anti-oxidents, high vit.C,?

usually..DRUG USAGEWhat would cause a false positive on a 5 panel urine test? anti-oxidents, high vit.C,?
Other than a very few prescription medications, which the screeners should have been notified of, nothing that you'd eat in your daily diet will show up on a urine test. The sole exception is if you eat a large amount of poppy seeds, which can show up as an opiate. But unless you ate five poppy-seed bagels or a few kolache, they wouldn't affect the test.What would cause a false positive on a 5 panel urine test? anti-oxidents, high vit.C,?
A false positive is related to the reliability of the test itself, i.e., does it give the same result if the same person is tested more than once? For example, if it is 95% reliable, than 5% of the time, you would expect the result to be wrong. This is the same reason why you can get a false negative (e.g., you are pregnant but the store bought test tells you that you are not pregnant, which, if we believe the ';99.9%'; effectiveness claim, should happen only once out of every 1000 tests or so...)

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