A Complete Guide to Addressing Underweight Concerns in Kids


Childhood is a phase of growth, development, and boundless energy. However, for some parents, the concern of an underweight child can be quite distressing. Children who are underweight can face various health issues, including a weakened immune system, delayed growth, and developmental problems. Understanding the causes and implications of underweight in kids is essential for parents and caregivers. This comprehensive guide aims to shed light on this issue and provide effective solutions to address it.

Understanding Underweight in Kids

Underweight in children refers to a condition where a child's weight is significantly lower than the average weight for their age and height. It is typically assessed using a growth chart, which compares a child's weight percentile to their age and height percentile.

Causes of Underweight

Understanding the factors that contribute to underweight in children is crucial. Common causes include:

  • Inadequate Caloric Intake: Children may not consume enough calories to support growth and development due to picky eating, poor appetite, or limited food choices.
  • Nutrient Absorption Issues: Even with a seemingly nutritious diet, if the body is unable to absorb nutrients properly, it can lead to underweight issues. The absorption of nutrients is a complex process influenced by factors like gut health and overall well-being.
  • Gut Health Matters: The gut plays a pivotal role in nutrient absorption. Poor gut health, imbalanced gut flora, or underlying gut issues can hinder the absorption of nutrients, leading to underweight concerns.
  • Medical Conditions: Underlying medical conditions such as gastrointestinal disorders, food allergies, or chronic illnesses can hinder weight gain.
  • Increased Energy Expenditure: Highly active children may burn more calories than they consume, leading to weight loss.
  • Psychological Factors: Stress, anxiety, or emotional issues can impact a child's eating habits and appetite.
  • Genetics: Genetics can play a role in determining a child's body type and metabolism.

Stages of low weight

Low weight or underweight conditions can occur in stages, each indicating varying degrees of nutritional deficiency and potential health risks. Here are the general stages of low weight:

  • Underweight (Mild): In the mild stage of low weight, kids have a body weight slightly below the expected range for their age and height. This may not necessarily indicate a severe health issue, but it can be a sign of inadequate nutrition or a minor illness.
  • Underweight (Moderate): Kids in this stage have a more noticeable degree of underweight, with a significant deviation from the expected weight range. This may be due to chronic dietary deficiencies, limited food intake, or underlying health conditions.
  • Underweight (Severe): Severe underweight is a critical stage where an child’s weight is substantially below what is considered healthy for their age and height. This condition can lead to a range of health problems, including weakened immune function, muscle wasting, and increased vulnerability to infections.
  • Malnutrition: Malnutrition represents the most severe stage of underweight, characterized by severe nutrient deficiencies and a significant risk of life-threatening health complications. Malnutrition can result from prolonged inadequate dietary intake or underlying medical conditions.
  • Wasting: Wasting is a specific condition marked by a significant loss of muscle and fat tissue, resulting in an extremely low body weight for a child's height and age. Wasting often indicates acute malnutrition and can be a symptom of severe illnesses or food scarcity.
  • Stunted Growth: Stunted growth refers to a condition where a child's height is significantly below the expected range for their age. It typically results from chronic malnutrition during childhood and can have long-lasting health and developmental consequences.

It's important to note that low weight can have various underlying causes, including inadequate dietary intake, chronic illnesses, digestive disorders, mental health issues, and socioeconomic factors. The severity of low weight may vary among kids, and the appropriate intervention and treatment will depend on the underlying cause and the specific stage of low weight. Early detection and intervention are crucial in addressing low weight and its associated health risks.

The Impact of Underweight

Underweight children are at risk of several health and developmental issues, including:

  • Weakened Immune System: Underweight kids are more susceptible to infections and illnesses due to a compromised immune system.
  • Delayed Growth and Development: Insufficient nutrition can lead to delayed physical and cognitive development.
  • Nutritional Deficiencies: Underweight children may lack essential nutrients, which can result in deficiencies affecting overall health.
  • Bone Health: Inadequate weight-bearing on bones can impact bone density and strength.
  • Emotional and Psychological Effects: Underweight children may experience self-esteem issues and emotional challenges.

Addressing Underweight in Kids

Balanced Diet

  • A well-rounded, nutritious diet is essential for underweight children. Include foods rich in healthy fats, protein, carbohydrates, vitamins, and minerals. Focus on:
  • Protein: Incorporate lean meats, poultry, fish, eggs, dairy products, and plant-based protein sources like beans and nuts.
  • Healthy Fats: Avocado, nuts, seeds, and olive oil provide essential healthy fats for energy.
  • Complex Carbohydrates: Opt for whole grains like brown rice, whole wheat bread, and oats.
  • Fruits and Vegetables: Include a variety of colorful fruits and vegetables to provide essential vitamins and minerals.

Frequent, Nutrient-Dense Meals

  • Offer smaller, frequent meals and snacks throughout the day to encourage calorie intake. Nutrient-dense foods should be a priority.

Pediatric Supplements

  • In some cases, pediatric supplements may be recommended by a healthcare professional to address specific nutrient deficiencies.

Monitor Growth

  • Regularly track your child's growth and weight with the guidance of a healthcare provider to ensure progress.

Promote a Positive Mealtime Environment

  • Create a positive mealtime atmosphere that encourages relaxed eating and minimizes stress around food.

Seek Psychological Support

  • If emotional factors contribute to your child's underweight condition, consider counselling or therapy to address these issues.

Be Patient and Consistent

  • Improving a child's weight and overall health takes time. Be patient, stay consistent with dietary changes, and seek professional guidance when needed.

TruVitals weight gaining combo offers a range of protein-rich products designed to support healthy weight gain in children. Our Sprouted Multigrain Milk Mix, Chocolate milk mix, and Protein Diskettes are carefully crafted with nutrient-dense ingredients to promote overall growth and development in kids.

As parents, ensuring your child maintains a healthy weight can be a concern, especially when dealing with picky eating habits. It's vital to encourage children to consume protein-rich and nutritious foods to meet their daily nutritional needs effectively.

Our Sprouted Sathu Maavu is a blend of sprouted ragi, sprouted wheat, sprouted moong dal, and more. Our Milk Mix incorporates protein-rich foods like quinoa, moong dal, oats, brown rice, peas, and features Brahmi, along with a mix of nuts and seeds. The Protein Diskettes are enriched with Chana dal, offering five times the fiber content of white rice. These ingredients not only provide ample protein but also support healthy weight gain.

At TruVitals, we take pride in our products being free from preservatives, artificial colors, and flavors. Our goal is to provide parents with wholesome and nutritious options to ensure their children's growth and well-being.


Underweight concerns in children go beyond the misconception that just consuming ghee or protein will lead to weight gain. It's imperative to dig deeper and understand the root cause of poor weight gain. Nutrition, gut health, nutrient absorption, and overall health play integral roles. To ensure optimal growth and development, it's essential to consult nutritionists who can provide tailored guidance and solutions based on each child's individual needs. Remember, addressing the root cause is the key to helping underweight children thrive and reach their full potential.

Written by 

Aditi Shah

M.F.C.Sc (Foods & Nutrition)

Pediatric Nutritionist