Can dandelion cause a positive result to a test for marijuana?

My husband used to take an herbal supplement containing dandelion (left there about two months). It is put on the liver transplant list and even contradictory results for marijuana. I had two positive and negative three. It is the ingestion of cookies, although the hand.

What is odd. Even if you use marijuana, which remains in the body for a month or so. I do not see how the dandelion that a positive result for THC if they are very different chemical structures. I would look for other drugs taking, or other parts of the supplement he was taking to see other possibilities.

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