Vitamin D for children in the UAE: how much is needed?

Vitamin D for children remains important in the sunny UAE: the daily reference intake is 400 IU (10 micrograms) before 12 months and 600 IU (15 micrograms) after the first birthday, accounting for food and supplements. These amounts concern prevention in healthy children, not treatment of an established deficiency. Whether a supplement is needed depends on age, feeding and diet, so sunshine alone is not a reason to stop it or increase the amount.

Why is vitamin D for children important?

Vitamin D supports normal calcium and phosphorus metabolism, bone mineralisation and skeletal growth. Severe deficiency can cause rickets, which affects the mineralisation of growing bones. Bone health is the central reason for standard preventive intake.

Vitamin D should not be treated as a universal immune remedy or a way to prevent every cold. Meeting a nutritional need and preventing particular infections are separate questions. For seasonal influenza prevention, see our article on flu vaccination.

How much is needed before and after age one?

For a healthy child, the daily reference intake depends primarily on age. It is 400 IU before the first birthday and 600 IU from 12 months onward. Food and supplements both count towards the total.

• From birth to 12 months: 400 IU, equivalent to 10 micrograms, each day.
• After 12 months: 600 IU, equivalent to 15 micrograms, each day, accounting for dietary intake.

The need for vitamin D does not end at the first birthday. Oily fish, eggs and foods fortified with vitamin D can contribute after infancy. Children's diets vary, so the amount needed from a supplement should reflect what the child actually eats.

These reference amounts are not a treatment plan for a child with established deficiency. Confirmed deficiency calls for a separate clinical assessment. A treatment regimen should not simply become the child's routine preventive intake.

How do breast milk and formula affect the decision?

Breast milk usually does not supply enough vitamin D, so exclusively breastfed babies are advised to receive 400 IU daily starting shortly after birth. Mixed-fed babies also need their daily requirement met. A supplement is needed when formula does not provide the required amount.

Infant formulas are generally fortified with vitamin D. Check the content of the particular formula and how much the baby drinks in a day. Both details matter when estimating intake from feeding.

An additional supplement may not be needed when a baby receives enough fortified formula. With smaller formula volumes or mixed feeding, extra vitamin D is usually needed to meet the daily requirement. Avoid automatically adding 400 IU without considering the vitamin already supplied by the formula.

Is supplementation needed throughout the year in the UAE?

Living in the UAE does not by itself remove the need for vitamin D prevention throughout the year. The number of sunny days is not the same as the amount of vitamin D produced in a child's skin. Heat can keep children indoors, and clothing often covers much of the skin.

Time spent outside, exposed skin area and individual factors also matter. An address in Dubai cannot establish whether a child receives enough vitamin D. Decisions about supplements should consider age and diet rather than the season alone.

Children should not spend extra time in direct sunlight simply to obtain vitamin D. Protecting the skin from excessive ultraviolet exposure remains important. Equally, a sunny climate does not mean every child needs more than the standard amount.

Does every child need a 25(OH)D blood test?

A healthy child without symptoms or risk factors does not need routine 25(OH)D testing just to decide on standard prevention. Testing should have a clinical reason. The result should help answer a specific question about the child's health.

A doctor may consider testing when deficiency or rickets is suspected, or when a child has nutrient malabsorption or certain chronic liver or kidney conditions. Some medicines and other individual factors can also affect risk. The decision depends on the child's overall circumstances.

What if a blood result is low?

Confirmed deficiency requires a treatment plan separate from routine prevention. A doctor may recommend a higher amount of vitamin D for a limited period. The choice depends on age, test findings, other conditions and the cause of the deficiency.

A result below a laboratory reference range is not a reason to multiply a child's intake without medical advice. Discuss what the result means and what should happen next. General questions about nutrition and assessment can be discussed during a consultation, including a house-call doctor visit.

Why is taking extra vitamin D a problem?

Excess vitamin D can be harmful because this fat-soluble vitamin can accumulate with prolonged excessive intake. This may cause high blood calcium and other complications. A larger amount does not automatically provide a larger benefit.

Check all supplements the child receives. Vitamin D may be present in a separate product, a multivitamin and fish oil at the same time. The combined intake matters, rather than the contents of each bottle considered in isolation.

For most healthy children, the starting points are age-appropriate intake, accounting for food and sensible prevention. Not every child needs a blood test, and not every child in the UAE needs extra vitamin D beyond standard intake. Deficiency treatment should follow an individual clinical assessment.

References on age-related needs and testing: CDC, NIH Office of Dietary Supplements and the Endocrine Society. This article is for information and does not replace individual medical advice.

Author: Dr. Khadi Tseloeva — Medical Director · General Practitioner, Lead Pediatrician.