Vitamin D For Kids: How Much Vitamin D Do Kids Really Need?

Vitamin D is essential for kids’ growth and development—starting from birth. It supports strong bones, immune health, and overall well-being.

But unlike many other nutrients, vitamin D can be harder to get through food alone. Natural sources are limited, and many kids may not get enough without a little extra help.

Knowing how much vitamin D your child needs is the first step to making sure they’re covered.

What Does Vitamin D Do?

Vitamin D works to balance and manage levels of calcium and phosphate. The body needs the trio of Vitamin D, calcium, and phosphate to preserve the health of bones and teeth, as well as muscle tissue. 

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While it’s important to make sure your child gets enough vitamin D, it’s also helpful to keep expectations realistic. We know vitamin D plays a key role in building strong bones and supporting muscle function. Other potential benefits are still being studied and haven’t been firmly established in clinical research.

Here’s Why Vitamin D is Important for Kids

Vitamin D deficiency can cause significant issues that may have lifelong consequences. Children who do not receive an adequate amount of vitamin D are prone to developing rickets, a condition that leaves bones weak and soft as they attempt to grow. 

Bones will continue to grow until your child becomes an adult. Some components of bone may continue to grow until the age of 25. Even when bones are done growing, they aren’t completely finished. Bone contains living tissue that needs to be fortified, which means bone growth and repair is lifelong.

If your child doesn’t receive an adequate amount of vitamin D in childhood, there is a significant chance that they will grow to have serious bone health issues throughout their lives. How Much Vitamin D Do Children Need?

Babies and young children need about 400 international units (IU)of vitamin D per day. Older children and adolescents need at least 600 IU of vitamin D daily.

Too much vitamin D can cause kidney problems, excess calcium in your blood, and abnormal heart rhythm. So be sure to stick with the recommended daily values of vitamin D for your child’s age. Infants shouldn’t exceed 1,000 IU per day. Children up to 8 years should adhere to a limit of 2,500 IU. People 9 years and older shouldn’t ingest more than 4,000 IU daily.

Foods with Vitamin D

Vitamin D is naturally found in a small group of foods—like fatty fish (salmon, sardines, tuna), liver, red meat, cod liver oil, and egg yolks. While these options are nutrient-rich, they’re not always kid-approved. Babies under 6 months can’t eat these foods at all, and toddlers may only tolerate them in small amounts.

Because natural sources are limited and often unappealing to young eaters, many foods are fortified with vitamin D. You’ll find added vitamin D in products like milk, yogurt, orange juice, breakfast cereals, and breads made with enriched flour.

Some of these fortified foods—like whole-grain bread or plain yogurt—can be part of a balanced diet. But others, especially sugary cereals, may come with ingredients parents prefer to limit. It’s tough to feel good about serving vitamin D with a side of added sugar first thing in the morning.

Low-fat dairy milk is a helpful source of vitamin D for many families, but it’s not an option for every child. Dairy is a common allergen, and lactose intolerance is widespread. Kids on plant-based diets also miss out on many of the most reliable vitamin D sources.

That’s where supplements can help. A high-quality vitamin D supplement can support your child’s needs—without added sugars, allergens, or unnecessary ingredients.

Vitamin D Supplementation is Commonly Recommended

While breastmilk is the best source of infant nutrition, research suggests it may not contain sufficient amounts of Vitamin D. So, the American Academy of Pediatrics recommends vitamin D supplementation for both breast and bottle fed infants to ensure they receive 400 IU per day. Toddlers and children who don’t meet their vitamin D RDA through diet alone should also take a vitamin D supplement. 

Doesn’t Vitamin D Come From Sunlight?

Yes, our bodies can make vitamin D from sunlight. When UVB rays hit the skin, they trigger a process that helps the body convert cholesterol into vitamin D—supporting everything from bone development to immune function.

But while sunlight is a natural source, it’s not the most reliable or safest way to meet your child’s vitamin D needs. Factors like time of year, skin tone, location, and time spent indoors can all impact how much vitamin D their body makes from the sun.

Some parents worry that sunscreen might block vitamin D production altogether. But current research shows that typical, everyday sunscreen use doesn’t lead to low vitamin D levels. Even with high-SPF products, a small amount of UVB still reaches the skin—and that’s enough for most people to maintain healthy levels.

That said, relying solely on the sun isn’t ideal—especially since protecting your child’s skin is always the priority. Fortified foods and supplements offer a consistent, safe way to help your child get the vitamin D they need without putting their skin at risk.

Making Sure Your Child Gets Enough Vitamin D

Even with a well-planned diet, many kids fall short on vitamin D—especially if they avoid certain foods or follow a restricted diet. If your child isn’t getting enough from food or safe sun exposure, a daily multivitamin can help fill the gap.

Talk with your pediatrician about your child’s eating habits. While true deficiencies are uncommon, especially in healthy kids, your provider may recommend a supplement—particularly for children with allergies, aversions, or limited diets.

Multivitamins are generally safe and can offer extra peace of mind when it comes to meeting essential nutrient needs, including vitamin D.

Hiya is Made for Your Children

Hiya’s multivitamins are designed for kids ages two and up. Hiya contains slightly more than the recommended daily amount of vitamin D for children. It also contains a wide variety of other vitamins and minerals that pediatricians often report children lack in their diets. 

After you talk to your children, pick up a bottle of Hiya. 

Our chewable multivitamin is vegan, gluten-free, non-GMO, and sugar-free. It’s naturally sweetened with monk fruit. There’s no artificial flavors, or gummy additives

It’s just the vitamins and minerals your child needs for a well-rounded diet, plus an organic fruit and vegetable blend to make the tablets tastier to chew.