I used super q caps (natural herb product) as a pre-detox coming back from a long vacation due to constipation. I also take random drug screens for my job and had one the same day as I took the caps, I was called 2 days later to submit another screen, which I did. I don't know the results of the original test but I was wondering because of the herbs if they suspect that I was attempting to adulterate the sample. The caps do contain protein, creatine, and a number of herbs to cleanse the intestinal tract.