Children and nutrition · October 5, 2026
One child in six on a GLP-1 drug developed a nutrient deficiency within a year
Vitamin D was the most common gap, yet only 5% of the children had nutrition counselling in their first month of treatment. Who should be checking what children eat on these medicines?
A study published in Childhood Obesity in 2026 followed children who started GLP-1 medicines, a drug class used for obesity and type 2 diabetes. Within one year of starting treatment, 16.8% of the children had been diagnosed with a nutritional deficiency. Vitamin D deficiency was the most common, affecting 12.4%.
The gap that stands out is counselling. Only 5% of the children received nutritional counselling within 30 days of starting treatment. These medicines can reduce appetite, so how much a child eats can drop quickly, and the risk of missing key nutrients is something to plan for from the start, not to discover later.
If your child is on one of these medicines, do not stop or change it on your own. Ask the prescribing doctor about blood tests, a food plan for growing bodies, and whether a supplement is needed. A registered dietitian can check the plate against what a child needs for protein, calcium, iron and vitamin D.
Children on GLP-1 medicines, first year
16.8%
Diagnosed with a nutritional deficiency within one year
12.4%
Vitamin D deficiency, the most common one
5%
Had nutritional counselling within 30 days of starting
Figures as summarised in the Medical Dialogues bulletin of 28 September 2026. The paper gives the cohort size and design; read it before quoting numbers beyond these three.
- Vitamin D is made in the skin with sunlight and is found in oily fish, egg yolks and fortified milk. Many diets supply too little of it, which is why it is the nutrient most often checked.
- Growing children need steady amounts of protein, calcium, iron and vitamin D. Changes in appetite can make it harder to meet all four without a plan.
- Counselling is not only for children who have a deficiency. A plan made at the start of treatment is the cheapest way to avoid one.
- Nutritional deficiencies in children treated with GLP-1 medicines (Childhood Obesity, 2026)Childhood Obesity, 2026. DOI 10.1177/21532176261486979 · The study
- Medical Bulletin, 28 September 2026Medical Dialogues · News summary of the study
General information, not medical advice. Never stop or change a child's medicine without the prescribing doctor.
Analysis by NutroPractic from the sources listed. Written for general readers; it does not replace advice from your own doctor.
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