Grapefruit varieties are red, pink or white in color and may come with seeds or may be seedless. Its size may vary from four to six inches round. The red and pink colored grapefruits have higher calories compared to the white. Also, the larger fruits have more calories than the smaller ones.
Summary. 1  Loss of appetite can cause fatigue due to low calorie intake and nutrient deficiency. 2  Fatigue means being constantly tired. 3  It may be a sign of an underlying health condition if youâre feeling fatigue, loss of appetite, and other symptoms such as vomiting and bloating.
Hypoglycemia or low blood sugar is another reason why you feel excessively hungry. Hypoglycemia symptoms such as hunger, fatigue, headache, cold sweats, confusion and mild tremors can be caused by over-exercising and not eating enough carbohydrates, starvation dieting, and alcohol addiction.