Somewhere between the school supply list and the first day of class, most parents make a handful of decisions about their child’s nutrition based on things they’ve simply always believed to be true. Some of these ideas came from a pediatrician years ago. Some came from a well-meaning relative. Some just seem like common sense, repeated so often that no one thinks to check them against what’s actually true.
Many of these beliefs sound entirely reasonable on the surface. As back-to-school season ramps up and daily routines reset, it’s worth taking a closer look at a few of the most common ones. Each myth below is checked against real, cited research with a focus on what current science tells us about children’s nutritional needs.
MYTH: Healthy kids don’t need vitamins.
FACT: Even children eating a fairly typical diet can fall short on specific nutrients. A 2021 analysis of NHANES data, the CDC’s large-scale national nutrition survey, looked at dietary intake among U.S. children ages 1 to 6 and found that while many nutrients were adequately consumed, intake of vitamin D, vitamin E, calcium, fiber, choline, and potassium was consistently below recommended levels, with vitamin D intake falling short in 87% of the children studied. Calcium and vitamin D are both central to bone development during a period of rapid skeletal growth, and choline is essential for early brain development, which makes these particular gaps significant.
MYTH: Picky eaters eventually catch up nutritionally.
FACT: A long-term UK study tracked children identified as picky eaters at age 3 and re-examined their diets at ages 10 and 13. Compared to non-picky children, picky eaters consistently ate less meat, fish, vegetables, and fruit, and more foods high in added sugar, even though their total calorie intake didn’t differ. That pattern showed up in their nutrient intake too, with lower average protein, iron, and zinc, and the gap persisted from age 3 all the way through age 13 in children whose picky eating continued. A separate study of 203 children found that zinc deficiency was significantly more common among picky eaters and was also significantly associated with poorer development scores and lower physical activity levels.
MYTH: Kids only need vitamins, not minerals.
FACT: A study measuring zinc levels in healthy 1- to 3-year-olds across three high-income Western European countries found zinc deficiency in 31% of the children tested, based on actual blood levels. Zinc supports immune function, wound healing, and normal growth, and deficiency has been associated with impaired growth in children. Minerals like zinc, magnesium, and calcium are just as essential to a child’s development as vitamins, and gaps in mineral intake can be just as easy to miss.
MYTH: If a nutrient is only needed in small amounts, it doesn’t really matter.
FACT: Selenium is required by the body in tiny amounts, measured in micrograms rather than milligrams, but a comprehensive review of its role in child development found it’s essential for thyroid hormone regulation, immune function, healthy growth, and neurodevelopment. Selenium is a component of enzymes that convert thyroid hormone into its active form in the body, and a shortfall in selenium can slow that conversion process. Selenium deficiency has been linked to impaired immune function and slowed growth in children.
MYTH: Vitamin D is only important for bone health.
FACT: Vitamin D receptors are found in skeletal muscle tissue as well as bone, and a systematic review of children ages 5 to 11 found a relationship between vitamin D levels and muscle strength. Vitamin D receptors are present on immune cells too, as last week’s article covered in more detail. Vitamin D supports bone density, muscle strength, and immune cell activity simultaneously, through receptors present in all three tissue types.
MYTH: Kids get enough vitamin D from fortified milk alone.
FACT: Fortified milk contains at least 2.5 mcg (100 IU) of vitamin D per 8-ounce serving under current U.S. standards, while the recommended daily intake for children is 15 mcg (600 IU). Meeting that target through milk alone would require roughly six cups a day. An analysis of national nutrition survey data confirms that fortified milk remains an important source of vitamin D for children, but typically falls short of covering their full daily need.
MYTH: Vitamin D only matters in winter.
FACT: A study of 706 school-age children found that even during summer, when vitamin D levels are at their yearly peak, about half of the children studied were already deficient. That rate climbed to over 90% by winter. Maintaining adequate vitamin D status should remain a year-round priority.
MYTH: Vitamins work instantly, so you’ll notice a difference right away.
FACT: Nutrient repletion happens gradually, over weeks or months of consistent intake.
Research on vitamin D supplementation in children has found measurable blood level changes typically take 8 to 12 weeks of consistent daily intake, while separate research on iron deficiency found developmental improvements took a full four months to appear, even with daily supplementation. Expecting an immediate, noticeable change can lead a parent to give up on a supplement before it’s had a real chance to help.
Where This Leaves Parents
Across these eight myths, a pattern emerges: gaps in children’s nutrition are common, they show up in specific and measurable ways, and they don’t resolve on their own just because a diet looks reasonably healthy on the surface. The research behind each of these myths points to the same conclusion: consistent, comprehensive nutrient support can help fill the kinds of gaps that ordinary eating patterns may leave behind during key stages of childhood growth and development.
Many children’s multivitamins provide a limited range of nutrients. PERQUE Life Guard™ Chewables provide 24 essential nutrients, including trace minerals like selenium and zinc, in forms the body can readily use. PERQUE D3 Cell Guard™ offers a bioavailable liquid source of vitamin D3 for optimal uptake and absorption. Together, they provide comprehensive nutritional support designed to help address common nutritional gaps identified in the research above.*
*This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
Author: PIH Team
PERQUE nutraceuticals are distinctive from the inside out. Each product represents a rethinking for how nutrients interact with the body and the impact they can have on the body’s ability to overcome the obstacles to repair and then stimulate natural healing responses.