Hi, for the past week or so I have been experiencing a darker green stool. It's solid and is normal in every other way. I've read on numerous websites that it can b caused by too many leafy vegetables, food dye and lots of iron in the diet. I haven't had a lot of leafy green vegetables or foods with blue, green or purple food dye that I'm aware of. I have eaten a mixture of 2 different breakfast cereals every morning with a banana every morning for, I'd say, over a month. Plus whatever other foods that may have iron naturally or supplemented into it. I also suffer from post nasal drip constantly, and heard that could also b a cause of green stool. However, the PND isnt green. Can you possibly help me figure out what could be causing the green stool?