Having a lack of appetite can be concerning, especially if you feel nausea, fatigue, and are experiencing rapid weight loss a loss of appetite can be caused by mental health issues like depression or anxiety, an infection or common cold, a stomach virus, or hypothyroidism read below for more information on why you may be having a lack of appetite. Weight loss no appetite. What causes weight loss and no appetite, in the context of medicine, health, or physical fitness, refers to a reduction of the total body mass, due to a mean loss of fluid, body fat or adipose tissue or lean mass, namely bone mineral deposits, muscle, tendon, and other connective tissue what causes weight loss and no appetite can either occur unintentionally due to malnourishment or an.
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