But, and there is always a but, diet and diet alone is the most prominent cause as well as the cure for constipation.So, if the main cause of constipation is a fiber-deficient diet, then both prevention and cure must lie in an unrefined high-fiber diet.If constipation is habitual and of long duration, the weakened bowels have to strengthened first and reeducated. even before a high-fiber diet will