Nutrition means intake, absorption, storage and utilization of the food by the tissues. An adequate food taken does not ensure adequate nutrition. In oral-cavity if you have gum trouble, toothache and ulcer in the mouth, this will limit the intake of food. Of course if you have loss of appetite due to illness or medical problems then this will also restrict ingestion of food. There is more than nutrition alone, the total caloric intake must be composed of certain proportion of carbohydrates, fats and proteins. There are 8 amino acids and a few unsaturated fatty acids that cannot be synthesized by the body. So they must be present in food to be gulped.
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