But someone can become malnourished for reasons that have nothing to do with hunger. People who have plenty to eat may still be malnourished if they don't eat food that provides the right nutrients, vitamins, and minerals.
For example, someone with celiac disease has intestinal problems that are triggered by a protein called gluten, which is found in wheat, rye, barley, and oats. Celiac disease can interfere with the intestine's ability to absorb nutrients, which may result in nutritional deficiencies.
People with cystic fibrosis have trouble absorbing nutrients because the disease affects the pancreas, an organ that normally produces chemical substances called enzymes that are necessary for digesting food.
The signs and symptoms of malnutrition depend on which nutritional deficiencies a person has, although they can include:
# poor immune function (which can cause the body to have trouble fighting off infections)
# poor growth
# muscle weakness
# bloated stomach (mostly in severe cases)
https://www.studentresources.net/college/healthzone/PageManager.aspx?dn=studenthealthzone&lic=180&cat_id=20323&article_set=34892&ps=604
Most people with CF need to take enzymes to replace the pancreatic secretions that help digest food. These enzymes are taken with every meal...If a person forgets to take their enzymes, they can have side effects from malabsorption. These include gas, bloating, stomach cramps...
http://www.uams.edu/pediatrics/cf/nutrition.as p