EzineArticles.com: Majority of obese people are said to have poor digestion so that the waste products from the food they eat tends to get retained in the colon. While other people will normally expel these wastes and toxins through the rectum, the obese will retain it in the colon so that it accumulates leading to poor digestion of foods. Poor digestion means that you consume more than what your body lets out, hence the gain in weight.

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