14 Healthy Tips To Support Weight Gain In Children

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Weight gain in kids is an important part of their development. A child is considered underweight if their BMI is below the fifth percentile when their weight is compared to their height. Being underweight during childhood might hinder their development rates. Thus, it is important to ensure that they get enough nutrients for their growth and development per their age (1). Various reasons might cause a child to be underweight. Hence, it is important to identify the root cause and modify their nutrition intake and diet accordingly.

Read on to know the possible causes of your child being underweight and how to help them gain weight.

Why Is A Child Underweight?

A child may be underweight either due to an underlying health issue or other factors that impede the child’s daily intake of calories. These reasons may include the following (2) (3).

  • Less daily calorie intake due to general disinterest in eating
  • Insufficient calories for the body due to increased physical activity
  • Parent’s lack of knowledge of the child’s daily calorie requirement
  • Diluted supplement preparations in case the child is on supplements
  • Underlying eating disorders such as anorexia nervosa
  • Inability to swallow due to neurological or oral sensitivity issues
  • Metabolic disorders that affect the conversion of food into energy such as galactosemia or phenylketonuria
  • Malabsorption due to diseases such as cystic fibrosis, Crohn’s disease, or celiac disease
  • Food allergies or intolerances that cause gastrointestinal disturbances
  • Childhood stress and trauma leading to disinterest in food
  • Chronic or recurring infections or diseases

What Happens If A Child Doesn’t Gain Weight?

A child who struggles to keep up with the growth pattern as per their age could be diagnosed with failure to thrive (FTT). This diagnosis would be made by a healthcare provider. FTT can lead to (4):

How To Help A Child Gain Weight?

The ideal treatment to help a child gain weight depends on treating the underlying cause. It’s best to involve a pediatric dietician in making changes to your child’s diet to improve weight gain. The following tips, including minute changes to their everyday food patterns, could be used alongside the treatment for better results (5) (6).

  • Provide your child with a balanced diet.
  • Base their meals on complex carbohydrate-rich foods such as potatoes, pasta, bread, or rice.
  • Prevent them from skipping their meals.
  • Avoid making the meals bulky. Six to eight small meals or snacks per day might be more suitable considering a child’s appetite.
  • Mix milk in pasta or soups to increase caloric content.
  • Encourage healthy protein-filled foods during their snack times, such as trail mix or nuts.
  • Substitute low-fat milk with whole milk or whole-milk yogurt for increased calorie intake.
  • Add cheese to recipes wherever you can.
  • Top-up fruits, pancakes, or waffles with heavy cream and dry fruits for some extra calories.
  • Include a cheese dip on the side with vegetable salads.
  • Provide them with fruit smoothies, milkshakes, or whole nuts or nut butters, which are calorie-dense.
  • Substitute oils with butter
  • Use avocados and fresh fruits on toasts and sandwiches.
  • Consider meats with healthy fat content.

You may also provide the child with any supplements or protein powder prescribed by a doctor for weight gain. Administering supplements to a child is not advised unless suggested by your healthcare provider or your dietitian (1) (7). A dietician could also help create a specialized diet plan to meet the right calorie requirement for your child’s age.

Besides these interventions, the following lifestyle changes could help a child eat food with interest and without any distractions, potentially improving the number of calories they consume.

  • Eat meals together as a family
  • Keep mobile screens away and TV off during meals
  • Maintain a regular meal time
  • Avoid low-nutrient, high-calorie foods such as junk food or soda/soft drinks
  • Encourage healthy food habits such as eating a balanced diet

Frequently Asked Questions

1. When should I worry about my child’s weight gain?

Parents must pay attention to their child’s weight and ensure they stay within a healthy weight range. A body mass index (BMI) less than the 5th percentile means the child is underweight, whereas a BMI at or above the 95th percentile means the child is obese (8). While weighing too less can lower immunity and affect growth, being overweight or obese can expose a child to the risk of developing chronic health conditions such as diabetes and breathing problems (9) (10).

2. What medical conditions cause weight gain in children?

Genetic syndromes such as Prader-Willi, leptin resistance, insulinoma (excessive insulin production), Cushing syndrome, growth hormone deficiency, and hypothyroidism are some medical conditions that can cause obesity in children (11) (12).

3. How can I tell if my child is underweight?

Regular monitoring of a child’s height and weight and plotting of the data on the CDC’s growth chart can help you know if your child is underweight or not.

4. What impact can a poor diet have on a child’s nutritional needs?

A poor or nutritionally imbalanced diet can’t meet your child’s nutritional needs. Besides, it can cause insufficiency, deficiency, or excess of nutrients, which can affect your child’s proper growth and development. Additionally, it can expose the child to several health issues due to weakened immunity (13).

Optimal weight gain in children is a sign that the body is receiving the nutrients it needs. Parents may maintain a growth chart for their children to check if they are gaining weight appropriately for their age. If your child has an underlying eating disorder, visit a specialist to treat or manage the problem so that your child can receive adequate calories through the food they eat.

Key Pointers

  • Decreased daily calorie intake, food allergies, and eating disorders are common reasons that render children underweight.
  • Being underweight can result in delayed development and decreased cognitive ability.
  • Below are some recommendations for preventing children from missing meals, providing them with a balanced diet, and managing your child’s weight issues.

References:

MomJunction's articles are written after analyzing the research works of expert authors and institutions. Our references consist of resources established by authorities in their respective fields. You can learn more about the authenticity of the information we present in our editorial policy.
  1. A Dietitian’s Best Advice If Your Child Is Underweight.
    https://health.clevelandclinic.org/dietitians-best-advice-child-underweight/
  2. 10 Possible Reasons Why Your Child Isn’t Growing?
    https://health.clevelandclinic.org/10-possible-reasons-why-your-child-is-not-growing/
  3. Slow Weight Gain In Infants And Children.
    https://www.childrenshospital.org/conditions-and-treatments/conditions/s/slow-weight-gain-in-infants-and-children/symptoms-and-causes
  4. Failure To Thrive (FTT) In Children.
    https://www.stanfordchildrens.org/en/topic/default?id=failure-to-thrive-90-P02297
  5. How To Help Your Child Gain Weight.
    https://www.stjude.org/treatment/patient-resources/caregiver-resources/patient-family-education-sheets/nutrition-dietary/how-to-help-your-child-gain-weight.html
  6. How Can I Help My Child Gain Weight?
    https://www.unlockfood.ca/en/Articles/Childrens-Nutrition/Children%E2%80%99s-Nutrition-Raising-Healthy-Kids/How-Can-I-Help-My-Child-Gain-Weight.aspx
  7. Does My Child Need A Supplement?
    https://www.eatright.org/food/vitamins-and-supplements/dietary-supplements/does-my-child-need-a-supplement
  8. Defining Childhood Weight Status.
    https://www.cdc.gov/obesity/basics/childhood-defining.html?CDC_AA_refVal=https%3A%2F%2Fwww.cdc.gov%2Fobesity%2Fchildhood%2Fdefining.html
  9. What to do if you are underweight.
    https://www.healthdirect.gov.au/what-to-do-if-you-are-underweight
  10. Obesity In Children And Teens.
    https://www.aacap.org/AACAP/Families_and_Youth/Facts_for_Families/FFF-Guide/Obesity-In-Children-And-Teens-079.aspx
  11. Childhood Obesity.
    https://www.childrenshospital.org/conditions/childhood-obesity
  12. Abeer Ataallah Ayyed Al-Hadidy et al.; (2021); Relationship between some hormones and obesity.
    http://wwjmrd.com/upload/relationship-between-some-hormones-and-obesity_1616591892.pdf
  13. The Risks Of Poor Nutrition.
    https://www.sahealth.sa.gov.au/wps/wcm/connect/public+content/sa+health+internet/healthy+living/is+your+health+at+risk/the+risks+of+poor+nutrition
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Sindusha MS

Sindusha is a clinical nutritionist with over two years of experience in diverse fields of nutrition. She did her Masters in Food Science and Nutrition from Avinashilingam Institute for Home Science and Higher Education for Women and has qualified UGC-NET. She interned as a quality control analyst and as a dietitian during her graduation. She was a part of several... more

Dr. Jessica Madden

(MD, FAAP, IBCLC)
Jessica Madden is a pediatrician, neonatologist, lactation consultant, and mother of four, who has been taking care of newborns since 2001. She works as a neonatologist in the NICU at Rainbow Babies and Children’s Hospital in Cleveland, Ohio, and founded Primrose Newborn Care, a newborn medicine and “4th trimester” home-visiting and telemedicine practice, in 2018.  Dr. Madden is a Fellow... more

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