Hi, my stools have been very dark brown in color for these last few weeks. Also it has loads of small white lumps and feathery looking bits/floaters in the toilet when i go. I have no problem with bowel movements, and it usually doesnt smell. I eat some fruit/veg everyday. I am also taking iron tablets, thyroid medication, vitamin B complex and dim plus. Can you tell me what can cause my stools to look like this?