In good health, digestion is simply the conversion of the food you eat into absorbable substances in the gastro-intestinal tract. This is achieved by a combination of mechanical (chewing/swallowing) and chemical breakdown of food into smaller and smaller molecules, with the assistance of glands both inside and outside the gut. The trouble is, this seemingly straightforward process is fraught with the potential to go wrong and when it does, you will certainly know about it.
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