Balanced Diet Basics for Children

A balanced diet for children does not need to be complicated. The core principle is variety — offering a good range of different foods from each food group, in amounts appropriate for the child's age and appetite. No single food or meal needs to be perfect; what matters is the overall pattern over days and weeks.

The 5 Food Groups and Portions by Age

Both the NHS Eatwell Guide (UK) and USDA MyPlate (US) organise a healthy diet around five main food groups. The proportions vary by age and activity level, but the basic structure is consistent.

A "serving" for a young child is considerably smaller than for an adult — roughly palm-sized for protein, a small cup for carbohydrates, and a small glass (150 ml) for milk.

The NHS Eatwell Guide for Children

The NHS Eatwell Guide divides the plate into proportional segments. More than a third of the plate should come from starchy carbohydrates (preferably wholegrain), another third from fruit and vegetables, and the remainder split between protein foods and dairy or alternatives, with oils and spreads used sparingly.

For children under 5, the full Eatwell Guide is not directly applicable — young children need more fat relative to body weight, and high-fibre foods should not dominate the diet as they can fill small stomachs before adequate calories are consumed. Full-fat dairy is recommended for children under 2, with a transition to lower-fat options possible from age 2 if the child eats well.

USDA MyPlate for Kids

MyPlate uses a plate divided into four sections — fruit, vegetables, grains and protein — with a separate dairy portion alongside. The key messages for children align closely with the NHS guidance:

• Make half your plate fruit and vegetables
• Make at least half your grains whole grains
• Move to low-fat or fat-free dairy for children over 2
• Vary your protein sources

MyPlate also emphasises limiting added sugars, saturated fats, and sodium — key concerns in children's diets given the high consumption of ultra-processed foods in many Western countries.

Key Nutrients for Children's Development

Calcium

Calcium is critical for building strong bones and teeth during childhood and adolescence — the years when the greatest proportion of lifetime bone mass is laid down. Good sources include:

• Milk, cheese and yogurt
• Calcium-fortified plant milks (oat, soy, almond)
• Tinned fish with soft bones (sardines, salmon)
• Tofu made with calcium sulphate
• Green leafy vegetables (kale, broccoli — though absorption rate is lower than from dairy)

Recommended intake: 350–1,000 mg/day depending on age (higher needs in adolescence during peak bone growth).

Iron

Iron supports cognitive development, immune function and oxygen transport. Iron deficiency is one of the most common nutritional deficiencies in children globally. Good sources include:

• Red meat and poultry
• Oily fish
• Eggs
• Lentils, chickpeas and beans
• Fortified breakfast cereals
• Dark green vegetables (spinach, kale)

Vitamin C consumed at the same meal significantly enhances absorption of plant-based iron. A glass of diluted orange juice with a lentil soup, for example, substantially increases the iron available for absorption.

Vitamin D

Vitamin D is needed for calcium absorption and bone development, immune function, and muscle health. It is made in the skin on exposure to sunlight, but in many northern countries (including the UK) sunlight is insufficient for adequate synthesis for much of the year.

The NHS recommends a daily supplement of 10 micrograms (400 IU) vitamin D for all children aged 1–4 years, and advises that older children who do not get regular sun exposure also consider supplementation. Dietary sources include oily fish, eggs, and fortified foods (some milks, cereals and spreads).

Omega-3 Fatty Acids

Omega-3s — particularly DHA — are important for brain development, vision, and anti-inflammatory processes. The best dietary sources are oily fish (salmon, mackerel, sardines, trout). Aim for two portions of fish per week, including one oily fish, as recommended by the NHS and USDA.

For children who do not eat fish, algae-based DHA supplements are an effective alternative and are the source from which fish themselves accumulate omega-3s.

Zinc

Zinc supports immune function, wound healing, growth and the senses of taste and smell. Good sources include meat, shellfish, legumes, nuts, seeds and whole grains. Zinc deficiency is uncommon in children eating a varied diet, but can occur in those following restrictive diets.

Foods to Limit

Added Sugar

Sugar provides calories without nutritional value and contributes to tooth decay, blood sugar instability, and — over time — excess weight gain. The key sources in children's diets are:

• Sweetened drinks (fizzy drinks, juice drinks, cordials, flavoured milk)
• Sweets and confectionery
• Cakes, biscuits and pastries
• Sweetened yogurts and breakfast cereals marketed to children

The NHS recommends that children aged 4–6 should have no more than 19 g of free sugars per day; those aged 7–10 no more than 24 g; and those aged 11 and over no more than 30 g. For reference, a single can of cola contains around 35 g of sugar.

Salt

Children's kidneys are less able to handle large amounts of salt than adults'. Excessive salt intake in childhood is associated with raised blood pressure. Most of the salt in children's diets comes from processed foods — bread, cereals, sauces, crisps, ready meals — rather than salt added at the table. Reading food labels and choosing lower-sodium options where possible makes a meaningful difference.

Saturated Fat

Some fat is essential in children's diets, but large amounts of saturated fat (from processed meats, pastries, full-fat cream, and many ultra-processed snacks) are associated with elevated LDL cholesterol. Healthy fats from oily fish, nuts, seeds, and olive oil should be prioritised over saturated sources.

Practical Tips for Fussy Eaters

Fussy eating is developmentally normal, particularly in children aged 1–6 years, and is thought to have evolutionary roots in toddlers becoming more cautious about unfamiliar foods during the period when they became mobile. Evidence-based strategies include:

• Repeated exposure without pressure: It can take 10–20 exposures to a new food before a child accepts it. Continue offering without forcing.
• Division of responsibility: Parents decide what food is offered, when, and where; the child decides whether and how much to eat (the Ellyn Satter model, widely endorsed by dietitians).
• Family meals: Children who eat with adults are more likely to try a wider variety of foods.
• Involve children in food preparation: Research shows children are more willing to eat foods they have helped prepare.
• Avoid using food as reward: Offering pudding as a reward for eating vegetables increases children's preference for pudding and reduces acceptance of vegetables.
• Keep portions small: Large portions of unfamiliar foods can be overwhelming. A small taste alongside familiar foods is less threatening.

Vegetarian and Vegan Children

Well-planned vegetarian and vegan diets can support healthy child development, but require more careful attention to specific nutrients:

Nutrients requiring close attention on a vegan diet:

• Vitamin B12: Not found in plant foods. Supplementation or regular consumption of fortified foods is essential for all vegan children. Deficiency causes irreversible neurological damage.
• Vitamin D: As above — supplement recommended for all children, particularly those with limited sun exposure.
• Calcium: Achievable through fortified plant milks, tofu and green vegetables, but portion planning is important.
• Iodine: Dairy is a major iodine source in UK diets. Vegan children may need a supplement or iodine-fortified foods.
• Omega-3 DHA: No dietary source in fully plant-based diets — algae-based DHA supplement recommended.
• Iron and zinc: Achievable from plant sources but absorption is lower than from animal sources. Vitamin C with meals helps.

A consultation with a registered dietitian with paediatric experience is strongly recommended for families raising children on vegan diets, particularly during infancy and the toddler years.

Putting It All Together

A practical framework for building balanced children's meals:

1. Half the plate: fruit and/or vegetables (aim for variety and colour)
2. Quarter of the plate: starchy carbohydrate (wholegrain where possible)
3. Quarter of the plate: protein (meat, fish, eggs, pulses or tofu)
4. Alongside: dairy or calcium-rich alternative (milk, yogurt, cheese or fortified plant option)
5. Small amounts: healthy fat from cooking oil, nuts, seeds or avocado

For further information on calorie needs by age, see our guide: How Many Calories Does a Child Need by Age.

For hydration guidance, see: Hydration Guidance for Children by Age.

Use our Child Nutrition Calculator for age-specific portion guidance.

Related Guides

• Healthy Snacks for Children by Age — nutritious snack options for every age group
• Healthy Meal Planning for Kids — practical weekly meal rotation ideas
• How Many Calories Does a Child Need? — reference ranges by age and sex
• Hydration Guidance for Children by Age — water and fluid intake guidance

Sources: NHS Eatwell Guide (Public Health England/UKHSA); USDA MyPlate (US Department of Agriculture); WHO Healthy Diet fact sheet; NHS Vitamins for Children guidance; Scientific Advisory Committee on Nutrition (SACN) reports. This guide is for general information only and does not constitute medical or dietetic advice. For personalised dietary advice, consult a registered dietitian or your child's GP.