If the child's BMI indicated they were underweight for their age, foods that have healthy fats and are full of protein will help the child build strong muscles and bones and encourage the child to gain weight. Provide an underweight child with protein-rich foods. Instead, offer water, milk and natural fruit juices. Avoid sodas and fruit juice drinks with added sugar.Choose lean meats such as chicken and turkey, and limit consumption of red meat.
Most processed foods should only be eaten occasionally. Avoid those that contain lots of chemicals and added sugars.
You can get an accurate measure of the child's height at home with a flat stick, a wall, and a measuring tape.