Brief Answer: Its a temporary problem Detailed Answer: Hello, Thanks for choosing health care magic for posting your query. I have gone through your question in detail and I can understand what you are going through. Vit C is a water soluble vitamin and no matter how much you take it, it will come out through stools or urine and it will have no residuum in the body. Your mustard color stool could be a side-effect of Vit C excess dosage but this adverse drug reaction is mostly temporary and self remitting. You need not do anything as of now. However do get yourself examined if the problem persists beyond 7 days. Hope I am able to answer your concerns. If you have any further query, I would be glad to help you. If not, you may close the discussion and if possible you may rate the answer for me, so that I get a good feedback. In future if you wish to contact me directly, you can use the below mentioned link: bit.ly/dr-srikanth-reddy Wish you good health, Kind regards Dr. Srikanth Reddy M.D.

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