I have been severely overweight for many years and have also had problems with my digestive system - mainly because of the fatty foods I used to eat and the amount of sugar I consumed. I have tossed between runny and constipation and very rarely normal bowel movements. However, the stool has always been of an acceptable color. But now I have started a strict diet which cuts out all fats, but maintains essential fatty acids, lots of fruit and veg and my bowel movements have become totally different, both in frequency and in color. Sometimes they movements are explosive, but never first thing in the morning. Could this be a result of the change of diet or should I seek medical attention. I am not feeling ill at all and the heartburn I used to suffer from has gone with the diet change. I eat a fair amount of mixed nuts (something I never did in the past) and wonder if this could have an influence.