If your teenager has been prescribed a GLP-1 medication for weight management or diabetes, you're likely focused on the immediate health benefits. But a recent study reveals a hidden concern that deserves your attention: these increasingly popular drugs may be silently draining your child's body of essential nutrients.
What the Research Found
Scientists studying children on GLP-1 medications—brand names you may recognise include Ozempic, Saxenda, and Victoza—discovered something alarming. Nearly 1 in 6 young patients developed a clinically diagnosed nutritional deficiency within just one year of starting treatment. Vitamin D deficiency was the most common problem, affecting about 12% of these children.
What makes this finding especially concerning is that these deficiencies often go unnoticed. Parents and healthcare providers may be so focused on weight loss or blood sugar control that they miss the warning signs of nutrient depletion happening quietly in the background.
Why This Happens
GLP-1 drugs work by slowing how quickly food moves through the stomach and making children feel fuller faster. While this helps reduce calorie intake, it also means less food is passing through the digestive system—and crucially, fewer nutrients are being absorbed. When you eat significantly less, your body struggles to get enough vitamins and minerals, even if the food choices are healthy.
Vitamin D deficiency is particularly worrying because it affects bone health during the teenage years when bones are still developing and strengthening. Other nutritional gaps can impact energy levels, immune function, and even mood and concentration at school.
What This Means for Singapore Families
Singapore parents are increasingly turning to GLP-1 medications as childhood obesity rates climb and type 2 diabetes diagnoses become more common in younger age groups. These drugs are prescribed by doctors in both private clinics and public hospitals, and some families even travel to other countries to access them privately.
However, the medical oversight that should accompany this treatment is still catching up. Many paediatricians and family doctors in Singapore may not yet be routinely screening young patients on these medications for nutritional deficiencies. This gap in care can leave your child vulnerable.
Additionally, Asian diets and lifestyle factors—such as limited sun exposure in tropical Singapore and high consumption of processed foods—may compound these deficiency risks.
What You Should Do Now
- Ask for baseline and ongoing blood tests. Before your child starts a GLP-1 medication, request a baseline blood test measuring vitamin D, B12, iron, and calcium levels. Then schedule follow-up testing every 3–6 months during the first year. Don't assume your doctor is already doing this—ask specifically about nutritional monitoring.
- Work with a dietitian familiar with GLP-1 medications. A registered dietitian can help your teenager eat nutrient-dense foods in smaller portions, and can recommend appropriate supplements. Look for professionals in Singapore who understand both Asian food culture and the specific challenges of GLP-1 therapy.
- Prioritise vitamin D and calcium during teenage years. Since bone development peaks in adolescence, ask your doctor about vitamin D supplementation and calcium-rich foods your child actually enjoys. In Singapore's climate, many teens need supplements rather than relying on sun exposure alone.
Weight management and diabetes control are important health goals. But they shouldn't come at the cost of hidden nutritional damage. By staying informed and proactive, you can ensure your teenager gets the full benefits of treatment while protecting their long-term health.