Loss of appetite and deficiency

Eating less for a short time may happen with infection, pain, nausea, stress, medication effects or mood changes. If reduced intake continues, the body may receive less protein, energy, iron and other nutrients. Possible clues to a nutritional problem include unusual tiredness, weakness, mouth changes, dizziness or reduced concentration, although these signs have many causes.

A clinician may review your usual diet, weight trend, medicines, digestive symptoms and medical history before deciding whether examination or blood tests are appropriate. Do not assume a supplement is needed from appetite alone.

Try small meals and snacks with protein and energy, such as eggs, beans, yoghurt, cheese, fish, chicken, nuts or fortified foods, according to your dietary needs. Keep drinks available and choose nourishing fluids if solid food feels difficult. Record what you eat, drink and any symptoms for a few days. Avoid taking high-dose supplements without professional advice.

Arrange an appointment if appetite loss persists, daily activities are becoming harder, clothing is becoming looser, or eating causes pain, vomiting or early fullness. Seek urgent help for fainting, confusion, severe weakness, signs of dehydration, vomiting blood or black stools. Earlier review is sensible for children, older adults and people with chronic illness.

Could my medicines or digestion be affecting appetite? Do my symptoms suggest a nutrient deficiency? Which tests, if any, are useful? How can I increase nutrition safely if larger meals are difficult?