When the thyroid gland produces too much hormone, it causes an
overactive thyroid, speeding up metabolism and calorie burning despite a healthy appetite.
Depression impacts brain areas governing appetite, causing changes such
as reduced appetite and weight loss, though some may experience increased appetite.
The immune system attacks insulin-producing cells in the pancreas,
leading to high blood glucose levels, and forcing the body to burn fat and muscle for
energy.
During advanced stages of COPD, a lung disease, weight loss occurs due
to calorie burning from labored breathing.
A contagious lung condition, it often leads to weight loss and reduced
appetite, although the exact causes remain unclear.
Untreated HIV can progress to AIDS, hindering the immune system and
causing weight loss due to malnutrition and reduced appetite from illness symptoms.