1 Underweight (BMI below 18.5): If you were underweight for your height you should gain 28 to 40 pounds. 2  Overweight (BMI of 25 to 29.9): If you were overweight for your height you should gain 15 to 25 pounds. 3  Obese (a BMI of 30 or higher): If you were obese for your height you should gain between 11 and 20 pounds.
In the UK, the most common causes of malnutrition in children are long-term health conditions that: 1  cause lack of appetite. 2  disrupt the normal process of digestion. 3  cause the body to have an increased demand for energy.
1 Two billion people in the world suffer from various forms of malnutrition. 2  1. 3  Malnutrition is an underlying cause of death of 2.6 million children each year â a third of child deaths globally. 4  2,3. 5  1 in 4 of the worldâs children are stunted 4; in developing countries this is as high as one in three. 1. 2  Malnutrition is an underlying cause of death of 2.6 million children each year â a third of child deaths globally. 3  2,3. 4  1 in 4 of the worldâs children are stunted 4; in developing countries this is as high as one in three. 5  5 This means their bodies fail to develop fully as a result of malnutrition.