Enkephalins arealso released by the CNS neurons, the hypothalamus, and 20 other areas outside the hypothalamus.Their function in the CNS is not altogether clear.eNriCHeD FOODFood product in which micronutrients such as iron or the B vitamins have been added.eNriCHMeNTProcess of restoring nutrients lost during processing to a food.eNTeral FeeDiNgFeeding by way of a tube inserted through the nose to