Appetite changes are common with cancer and cancer treatment. Individuals with
poor appetite or appetite loss may eat less than usual, not feel hungry at all,
or feel full (satiated) after eating only a small amount. Ongoing appetite loss
can lead to
weight loss, malnutrition, and loss of
muscle mass and strength. The combination of weight loss and loss of muscle
mass, also called wasting, is referred to as cachexia.
Causes
Appetite loss is common in people with cancer. Certain types of cancer,
including ovarian, pancreatic, and stomach cancers, can cause a loss of
appetite, usually by affecting a person's metabolism. Cancer-related weight loss
is not like starvation, and eating enough food doesn't solve the problem—unlike
starvation, weight loss associated with cancer results in a loss of muscle mass.
Appetite loss also occurs in 80% to 90% of people with advanced cancer for
various reasons, including changes in metabolism, early satiety (feeling of
fullness) from ascites (accumulation of fluid in the abdomen), and other
symptoms of cancer.
Other causes of appetite loss include chemotherapy, immunotherapy, and sedative
medications (drugs that cause feelings of calm or sleepiness). In addition,
radiation treatment or surgery to any part of the gastrointestinal system, such
as the stomach or intestines, can also cause appetite loss.
Several of the side effects commonly experienced with chemotherapy and radiation
treatment may also cause appetite loss, including:
Management
If possible, the first step in treating appetite loss is to treat the underlying
cause. Treatment for conditions such as mouth sores, dry mouth, pain, or
depression should help improve appetite. Additional treatment for appetite loss
and associated weight loss may include appetite-stimulating medications,
medications that help food move through the intestine, nutritional supplement
drinks, and tube feeding (often a nasogastric tube that passes through the nose
into the stomach).
Although you may not feel like eating, it is important to remember that good
nutrition and maintaining a healthy weight are important parts of overall cancer
care and recovery. Eating well can also help a person better cope physically and
emotionally with the effects of cancer and cancer treatment. The following tips
may be helpful in maintaining proper nutrition when your appetite is poor.
- Eat five to six small meals a day and snack whenever you are hungry.
- Determine what times of day you are hungry, make sure to eat at those times, and
do not limit how much you eat.
- Eat nutritious snacks that are high in calories and protein (for example, dried
fruits, nuts, yogurt, cheeses, eggs, milkshakes, ice cream, cereal, pudding, and
granola bars).
- Keep favorite foods on hand for snacking.
- Add calories and protein to foods by adding sauces, gravy, butter, cheese,
peanut butter, cream, and nuts.
- Drink fluids between meals rather than with meals. Drinking during a meal can
make you feel full too quickly.
- Choose nutritious drinks, such as milk, milkshakes, and juices.
- Ask family members or friends to prepare foods when you are too tired to cook.
Ask them to shop for groceries or buy precooked meals.
- Try to eat in pleasant surroundings and eat meals with family or friends.
- Eat food that is cold or at room temperature to decrease its odor and reduce its
taste.
- Ask your doctor about ways to relieve other gastrointestinal symptoms, such as
nausea, vomiting, and constipation.
- If your sense of taste is diminished, try adding spices and condiments to foods
to make them more appealing.
- Try light exercise, such as a 20-minute walk, about an hour before meals to
stimulate your appetite. (Consult your doctor before starting an exercise
program.) Exercise also helps maintain muscle mass.
- Meet with a registered dietitian (RD) for additional advice on meal planning.
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