Malnutrition. Malnutrition is an imbalance between the nutrients your body needs to function and the nutrients it gets. It can mean undernutrition or overnutrition. You can be malnourished from an overall lack of calories, or you might have a protein, vitamin or mineral deficiency. You might also have more excess calories than your body knows
Signs and symptoms of vitamin A deficiency. Subclinical forms of vitamin A deficiency (VAD) may not cause any symptoms, but the risk of respiratory and diarrheal infections is increased, the growth rate is reduced, and bone development is slowed. Abnormal visual adaptation to darkness, dry skin, dry hair, broken fingernails, and decreasedL7qB8.