Scientists Develop 13-Food Checklist That Could Detect Hidden Nutrient Deficiencies in Children

Key Takeaways

• Scientists at the ICMR-National Institute of Nutrition (ICMR-NIN), Hyderabad, have developed a simple checklist based on 13 everyday food groups.

• In an early study of 76 children, those who ate from 10 or more of these food groups were more likely to have healthy levels of key nutrients.

• The checklist after validation could help parents, teachers, and health workers spot hidden nutrient gaps before they cause visible problems.

Scientists at the ICMR-National Institute of Nutrition (ICMR-NIN), Hyderabad, have developed a simple 13-food-group checklist that may help identify children at risk of hidden nutrient deficiencies without expensive blood tests. In an early study of 76 children, those who ate from 10 or more food groups were significantly more likely to have adequate nutrient intake.

Hidden nutrition gaps, also known as "hidden hunger," occur when children consume enough calories but still lack essential vitamins and minerals needed for healthy growth and development.

Although many children appear healthy, deficiencies of nutrients such as iron, calcium, vitamin B12, and vitamin A may go unnoticed for years before affecting growth, immunity, or learning. Detecting these deficiencies often requires detailed dietary assessments or blood tests, both of which can be expensive and time-consuming. Researchers at ICMR-NIN, Hyderabad, developed this checklist to provide a simpler way of identifying children who may be at risk.

What Is the Diet Diversity Score (DDS)?

The Diet Diversity Score (DDS) is a simple screening tool developed by researchers at ICMR-NIN to estimate whether children are likely to be getting enough essential nutrients based on the variety of foods they eat. Each food group consumed earns one point, producing a total Diet Diversity Score ranging from 0 to 13. Unlike previous methods used for determining the consumption of different nutrients by children, this technique does not require quantifying every nutrient in the child's diet. The concept behind this approach is simple: children who consume foods from a greater variety of food groups have a greater likelihood of meeting their nutrient requirements. The researchers classified common foods consumed in India into 13 nutrient-based food groups according to their nutrient content.

Does Portion Size Matter in the Diet Diversity Score?

The practicality gives this checklist a strong potential to reflect the eating habits of the Indian population realistically.

The scientists set a minimum amount required for a food to count toward a food group. Even a small amount, around one teaspoon or roughly five grams, counts toward the food group. This means a spoonful of dal mixed with rice, small pieces of vegetables in a curry, or a small piece of fruit all contribute to the score, even if they are not eaten as full servings.

Many nutrient-rich ingredients in Indian meals are consumed in small quantities but still contribute important vitamins and minerals.

ICMR-NIN Study Results: Does the Diet Diversity Score Predict Nutrient Deficiency?

To test whether this checklist actually reflected children's nutrient status, the researchers studied 76 children aged 6 to 10 years in two villages in the Ghatkesar area of Telangana. Over several days, they recorded exactly what each child ate and also checked blood markers, including hemoglobin, alongside a broader set of nutrient adequacy measures.

Children who ate from 10 or more of the 13 food groups (using the small five gram threshold) were considerably more likely to have adequate levels of key nutrients. In statistical terms, this cutoff was quite good at telling apart children with adequate nutrient intake from those without it.

The researchers also reported that this cutoff performed well in distinguishing children with adequate nutrient intake from those without it, with an area under the receiver operating characteristic curve (ROC-AUC) of 0.89, indicating good overall predictive performance.

Is the Diet Diversity Score a Validated Screening Tool Yet?

This study tested the checklist in the same small group of children it was built from, 76 children in two villages in one district. That means it shows the tool works well in the exact setting it was designed and tested in, but it has not yet been checked in a separate, independent group of children, in cities, or in other states with different food habits. The researchers have been explicit that the tool needs further testing across diverse regions before it can be recommended for routine, large-scale use.

This is a promising prototype rather than a finished, certified tool. The distinction matters, especially before recommending it as something schools or clinics should adopt right away.

How to Spot Nutrient Deficiency in Children: 8 Warning Signs

While the Diet Diversity Score is still being tested, parents don't need to wait for a validated tool to watch for warning signs. Certain symptoms point to a possible nutrient deficiency and deserve a doctor's attention rather than a wait-and-watch approach:

1. Unusual paleness of the skin, lips, or the inside of the eyelids (a possible sign of iron deficiency or anemia)

2. Poor or slowed growth compared to other children the same age

3. Frequent infections or illnesses that keep coming back

4. Persistent tiredness, weakness, or low energy, even after adequate rest

5. Difficulty seeing in dim light (a possible sign of vitamin A deficiency)

6. Brittle nails, hair thinning, or slow wound healing

7. Poor concentration or falling behind in school, which can sometimes be linked to iron or B12 deficiency

8. Bone or joint pain, or delayed teething, which can point to calcium or vitamin D deficiency

How to Improve Diet Diversity in Children: A Practical Food Group Checklist

Even before this tool is formally validated, the underlying idea is sound and can be useful right now: children generally benefit from eating a wide variety of foods rather than the same few items repeatedly.

As a simple daily habit, parents and teachers can check whether a child's meals include foods from multiple food groups over the course of the day, such as:

• Grains

• Pulses

• Dairy foods

• Vegetables, including leafy greens

• Fruits

• Nuts and seeds, where appropriate

• Eggs, meat, or fish, where included in the family's diet

This is a general wellness habit and does not replace medical advice or nutritional assessment for an individual child.

Final Takeaway

Researchers at ICMR-NIN, Hyderabad, have developed a simple, low-cost checklist that links how many food groups a child eats from to their likely nutrient status. In an early study of 76 rural children, eating from 10 or more of 13 food groups was strongly linked to healthier nutrient levels. It's an encouraging step toward affordable nutrition screening for Indian children, but it is still an early-stage finding that needs to be tested in many more children before it becomes a tool that schools, clinics, or families can rely on. For now, the simplest and safest takeaway is a familiar one: offer children a variety of foods, and see a doctor if there are any visible signs of a health or growth concern.

References

1. Konapur, A., M. N. Krishnapillai, B. Kulkarni, B. Nagalla, and S. M. Gavaravarapu. "Evaluation of a Context-Specific Diet Diversity Score (DDS) for Predicting Micronutrient Adequacy in 6-10-Year-Old Rural Indian Children." European Journal of Clinical Nutrition (2026). https://doi.org/10.1038/s41430-026-01779-2.

(Rh/AK/MSM)