Not feeling hungry but eating normally is caused by indigestion, weakness of the spleen and stomach, and excessive intake of indigestible food. When indigestion is present in the body, food stays in the stomach for a longer period of time, and because of the presence of food in the stomach, you do not feel hungry. In the early stages of indigestion, the amount of food is normal, but as the condition persists, the amount of food decreases. Some people have a weak spleen and stomach, and because of the relatively weak digestion of food, there is often a lack of hunger. People with a weak spleen and stomach have a normal amount of food, although the absorption of nutrients is relatively poor. Some people prefer fatty and starchy foods in their diet, which are more difficult to digest and take relatively longer to digest. However, it does not affect the appetite, so the quantity of meals is normal.