Walk down any supermarket aisle and you’ll find shelves of children’s vitamins — gummies, chewables, sprays, and powders, all promising to boost immunity, support growth, and keep kids healthy.
But do children really need supplements? Or can a balanced diet give them everything they need?
As a children’s dietitian, I’m asked this all the time. The truth is, while some children benefit from supplements, many don’t need them at all. Let’s break down what’s really necessary and what’s just clever marketing.
Do Children Need Supplements?
For most healthy children who eat a varied diet, supplements are not essential. Whole foods provide not only vitamins and minerals, but also fibre, antioxidants, and other nutrients that can’t be bottled.
However, there are a few exceptions where supplements are recommended or helpful, especially when dietary intake is limited or specific nutrients are hard to get from food alone.
The Key Supplements Children May Need
1. Vitamin D
This is the one supplement that nearly all children in the UK need.
Why: We get most of our vitamin D from sunlight, but in the UK, there isn’t enough from October to March.
Recommendation: All children aged 6 months to 5 years should take a daily supplement of 10 micrograms (µg) vitamin D. Babies who are formula-fed and drink over 500ml of formula a day do not need extra vitamin D.
2. Vitamin A and C (for some children)
Public Health England recommends that children aged 6 months to 5 years take a vitamin A, C, and D supplement, unless they’re getting enough from diet and fortified foods.
These vitamins support growth, immunity, and healthy vision.
3. Omega-3 (Optional but Helpful)
If your child rarely eats oily fish (like salmon, sardines, or mackerel), an omega-3 supplement can help support brain and eye development.
Look for one with DHA and EPA from fish oil or algae (for plant-based diets).
4. Iron (Only if Recommended)
Iron supplements are not routinely needed unless your child has a diagnosed deficiency or follows a vegan or very selective diet.
Iron is best obtained from foods such as red meat, green vegetables, beans, lentils, eggs, and fortified cereals.
When Supplements Might Be Needed
You may want to consider supplements if your child:
- Eats a very limited or “picky” diet
- Avoids entire food groups (e.g. dairy, meat)
- Follows a vegan or vegetarian diet
- Has a diagnosed deficiency or absorption issue
- Is growing slowly or has medical reasons affecting nutrition
If you’re unsure, speak with a registered dietitian before starting supplements, not all products are created equal, and too much of some vitamins can be harmful.
Supplements to Be Cautious With
Be wary of:
- “Immune booster” gummies – often unnecessary and high in sugar.
- Herbal or “superfood” blends – not well-regulated or evidence-based.
- Adult multivitamins – can exceed safe levels for children.
Always check the label for age-appropriate doses and choose products approved by reputable health bodies.
The Bottom Line
✅ Most children can get what they need from a balanced diet.
☀️ Vitamin D is the key supplement recommended for all children.
🍎 A varied diet rich in fruit, veg, dairy (or alternatives), and wholegrains is still the foundation of good nutrition.
Supplements should support a healthy diet not replace it. If you’re worried your child isn’t getting enough of certain nutrients, speak to a children’s dietitian for personalised guidance.
Want Help Understanding What Your Child Really Needs?
Book a 1:1 consultation and get tailored, evidence-based nutrition advice that gives you peace of mind, no guesswork, no guilt.
👉 https://the-childrens-dietitian.com/contact-me/