What is the Most Common Cause of Loss of Appetite?

Cold and Flu

When people get a cold or flu, they may experience loss of appetite. This is because their bodies do not receive the basic nutrients needed to resist infection. If this situation persists or prolongs, it may indicate malnutrition and other issues that require medical intervention to solve.


Cancer is a group of diseases that occur when abnormal cell growth is out of control. Then, they can invade nearby tissues or spread to other parts of the body. The appetite of cancer patients may change for various reasons, such as changes in taste or oral sensation during treatment, nausea or vomiting caused by the disease itself. People with long-term cancer may experience loss of appetite, known as anorexia. This may indicate cancer cachexia. Cancer can make you feel weak and tired, which can also lead to loss of appetite.


Different medications can lead to decreased appetite. These include opioid analgesics, antibiotics, antihypertensive drugs, and any other medications that may cause stomach discomfort or worsen existing diseases. Drugs may cause changes in your taste or smell, leading to a decrease in interest in food, all of which are referred to as adverse drug reactions (ADRs).

Mental illness

Depression is the most common mental illness that usually leads to a decrease in appetite. In addition, depression may lead to fatigue, low energy levels, and overwhelming feelings of despair. Other mental illnesses that may cause loss of appetite include bipolar disorder, schizophrenia, and mental illness. The treatment of these diseases usually includes talk therapy, medication, and lifestyle changes.

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