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Picky eating can feel like a frustrating toddler phase, but what if your child’s narrow food list is actually a clue about zinc status, sensory processing, gut health, stress, sleep, or even the microbiome? In this episode of The Dr. Brighten Show, Dr. Jolene Brighten sits down with Dr. Elisa Song, a Stanford-, NYU-, and UCSF-trained holistic pediatrician, founder of Whole Family Wellness, and creator of Healthy Kids, Happy Kids, to explore what parents need to know about nutrition, food aversions, gut health, ADHD, anxiety, immune resilience, and the surprising body systems that can shape how kids eat, feel, and function.
In this conversation, you’ll learn why nutrition matters for everything from brain development to immune health, why zinc may be one of the first nutrients to consider in highly selective eaters, and how a child’s gut microbiome may influence nutrient absorption, mood, hormone health, food cravings, and more. Dr. Song also shares practical strategies parents can use immediately, including how to involve kids in food choices, support the microbiome without creating more mealtime stress, teach kids to read food labels, and build nervous system regulation into daily family life.
Picky Eating: What You’ll Learn in This Episode
If your child only eats a handful of foods, refuses new textures, melts down when food touches their hands, or suddenly rejects foods they used to love, this episode will help you think beyond the usual advice to “just keep offering it.” Dr. Song and Dr. Brighten explore picky eating through a root-cause lens, connecting nutrition, sensory input, the gut, immune development, stress, and hormones in a way that gives parents more tools and more hope.
You’ll learn:
- Why a very narrow palate may be a sign that nutrient insufficiencies are worsening picky eating, not just a behavioral issue.
- The nutrient Dr. Song says is “number one” to consider when kids are extremely selective with food.
- How zinc can change taste preferences and may influence sensory issues around smell, texture, and the feel of food in the mouth.
- Why some kids who are bothered by food textures may also react strongly to clothing tags, blender sounds, or the vacuum.
- The story of a child who was eating only three foods and, after zinc support, began trying chicken, broccoli, and several more foods within about a month and a half.
- Why getting kids involved in the grocery list, meal list, farmers market, or choosing a vegetable may make them more willing to explore food.
- What parents need to know about zinc forms like zinc picolinate, zinc glycinate, and zinc sulfate.
- Why zinc may upset the stomach and why taking it with food or at night may make it easier to tolerate.
- Why Dr. Song sometimes checks a red blood cell zinc level and may be surprised by how low a child’s zinc status is.
- Food sources of zinc Dr. Song discusses, including animal protein, shellfish, legumes, nuts, seeds, and pumpkin seeds.
- Why a vegetarian family’s pumpkin seed strategy helped raise a child’s zinc levels.
- How quercetin-rich foods like red apples, red grapes, purple onions, capers, and watercress may support zinc utilization.
- Why kids who eat plenty of meat may still struggle if they are not absorbing nutrients well.
- How the gut microbiome shapes the immune system, brain development, metabolic health, hormone systems, and nutrient absorption.
- Why Dr. Song says a baby’s microbiome is different from an adult’s and why, for infants, the goal is not always more diversity.
- The compelling infant microbiome statistic Dr. Song shares: a baby’s microbiome may ideally be nearly 80% to 100% bifidobacteria.
- Why small amounts of bacteria that are not desired in adults may play a role in immune training for babies.
- How puberty may create distinct microbiome differences between boys and girls.
- Why Dr. Brighten connects microbiome health to women’s health, explaining that mom’s microbiome becomes baby’s microbiome.
- Why the loss of estrogen in menopause may decrease microbial diversity, a women’s health connection Dr. Brighten highlights in the episode.
- Why Dr. Song says the five daily foundations for “microbiome magic” include things families are already doing: eating, sleeping, breathing, moving, and drinking.
- How sleep and movement may support the gut microbiome even before a parent tackles food changes.
- Why a child eating only three foods may benefit from starting with sleep or movement rather than immediately changing the diet.
- How gut organisms may influence cravings for sugar and ultra-processed foods.
- Why Dr. Song teaches kids to make meals “pop with plants on purpose.”
- How food label detective work can help kids make better packaged-food choices without shame.
- Why nervous system regulation, heart rate variability, and vagus nerve support matter for kids and parents.
- The statistic Dr. Song shares about children’s heart rate variability: it has been decreasing since the 1980s.
- Why Dr. Song says kids with ADHD tend to have lower heart rate variability.
- Why belly breathing and parasympathetic nervous system practices may be essential for modern families.
Picky Eating, Gut Health, Zinc, and the Microbiome: What Dr. Elisa Song and Dr. Jolene Brighten Discuss
This episode begins with a question that every parent, grandparent, caregiver, and clinician should consider: what do you wish every parent knew about their child’s nutrition? Dr. Song’s answer is simple but powerful: it matters. Food provides the building blocks for the brain, immune system, future cardiometabolic health, and, as Dr. Brighten points out, the future hormone health of girls.
That matters because picky eating is often treated like a battle of wills. Parents are told to keep offering foods, stay calm, avoid pressure, and wait it out. While those strategies can be useful, Dr. Song adds an important layer: when a child has a very narrow palate, nutrient deficiencies or insufficiencies may be making the pickiness worse. In other words, the child may not simply be refusing food because they are difficult. Their body may be giving clues.
One of the biggest clues discussed in this episode is zinc. Dr. Song explains that many kids are insufficient or deficient in zinc, and zinc can influence taste preferences and sensory experiences. This is especially relevant for kids who are sensitive to smell, texture, the feel of food in their mouth, or other sensory inputs like clothing tags and household noises. For parents who have watched their child reject foods because of texture, gag at certain smells, or panic when sticky food gets on their hands, this conversation offers a different way to think about the problem.
Dr. Song shares a story about a mother who recognized signs of zinc deficiency in her daughter. The child was eating only three foods, and after starting liquid zinc, she began expanding her diet within about a month and a half. She wanted chicken, tolerated a little broccoli on her plate, and added several more foods. This is not presented as a universal cure, but as a clinical pearl that may help parents understand why nutrient status deserves attention.
The conversation also gets practical about zinc supplementation. Dr. Song discusses zinc picolinate and zinc glycinate as forms she often uses because they may be more easily absorbed, while also noting that zinc sulfate can work well for some kids. She explains that zinc can upset the stomach, a side effect many adults have experienced when taking vitamins, and that taking zinc with food or at night may help. She also discusses ranges she may consider by age and situation, while emphasizing that testing, especially red blood cell zinc, may be helpful because some children need more support to reach optimal levels.
For parents who want to begin with food, the episode covers zinc-rich options. Dr. Song highlights animal proteins and shellfish such as shrimp and scallops, while also discussing legumes, nuts, and seeds. One standout food-based strategy involves grinding pumpkin seeds into a powder and adding them to soups, salads, oatmeal, or smoothies. For vegetarian families, this can be especially useful. The conversation also touches on quercetin as a zinc ionophore, meaning it may help zinc get into cells. Foods discussed include red apples, red grapes, purple onions, capers, and watercress.
From there, Dr. Brighten asks an important question: what if kids are eating zinc-rich foods but still not absorbing their nutrients? That opens the door to one of the episode’s most important themes: the gut microbiome.
Dr. Song explains that the microbiome influences how the immune system develops, how the brain develops, how hormones and metabolic systems develop, and how well children absorb nutrients from food. The microbiome also makes B vitamins such as folate and vitamin B12, supports vitamin K production, and produces postbiotics like GABA and serotonin, which may support calm and relaxation. This can matter for kids who feel anxiety around new foods, new sensations, or mealtime.
The episode also clarifies that children’s microbiomes are not the same as adult microbiomes. Up until about age three or three and a half, children’s microbiomes have a very different pattern. Dr. Song explains that while adults often want more microbial diversity, infants are different. For babies, the microbiome should be much less diverse, with bifidobacteria making up nearly 80% to even 100% of the microbiome. She also explains that a small amount of bacteria that would not be desirable in adults may help train a baby’s immune system.
This leads to a broader conversation about immune training, farm exposure, eczema, asthma, and how the modern world may not support the microbiome the way our bodies need. Dr. Brighten brings in the women’s health connection, noting that the health of a mother’s vaginal and gut microbiome impacts the baby’s developing microbiome from birth. She also highlights that estrogen loss in menopause decreases microbial diversity, connecting the microbiome conversation across the lifespan: from preconception to infancy to puberty to menopause.
Dr. Song then shares what she calls the five things for “microbiome magic.” These are not complicated protocols. They are things families already do every day: eat, sleep, breathe, move, and drink. The key is doing them in a way that helps the microbiome flourish.
This is especially important for parents of picky eaters because starting with diet can feel overwhelming. If a child eats only three foods, trying to overhaul their meals may create more stress for everyone. Dr. Song explains that sleep and movement can optimize the gut microbiome independently of diet. That means a parent may be able to begin with better sleep rhythms, more movement, or nervous system support before changing what is on the plate.
When it comes to food, Dr. Song discusses the “three F’s”: fiber, phytonutrients, and fermented foods. She encourages families to make every meal “pop with plants on purpose.” This does not always mean forcing a child to eat a brand-new vegetable. If broccoli is already a safe food, maybe the next step is trying purple broccoli. That still introduces a new phytonutrient and keeps the process approachable.
The conversation also addresses older kids and teens who are making more food choices outside the home. Dr. Song encourages parents to teach kids to become savvy food label leaders or food label detectives. Instead of simply banning foods, she recommends helping kids understand what supports their gut, brain, immune system, and performance. In one example, she describes helping her son choose a drink he could feel good about and that she could feel good about too. The goal is a win-win: empowering kids while still guiding them toward better choices.
The episode then shifts into nervous system regulation. Dr. Song explains that heart rate variability reflects how well the autonomic nervous system can move into a rest, digest, and restore state. She shares that children’s heart rate variability has been decreasing over the decades, with research from a cardiologist in Germany measuring heart rate variability in kids with and without ADHD. Kids with ADHD tend to have lower heart rate variability, and overall trends suggest modern life is taking a toll on kids’ nervous systems.
That matters for picky eating because food stress is still stress. If a child is in fight-or-flight mode, asking them to try a new food may be too much. Dr. Song discusses diaphragmatic breathing, belly breathing, and apps such as Calm, Insight Timer, and Oak as possible tools for turning on the parasympathetic switch. She emphasizes that adults are not doing this enough either, making nervous system regulation something parents and kids can practice together.
The transcript also expands beyond picky eating into homework, psychological stress, executive function, ADHD, PANS, PANDAS, inflammation, choline, mitochondrial support, and how parents can advocate for their children. While picky eating is a major entry point, the bigger theme is pediatric health from the inside out. Dr. Song and Dr. Brighten repeatedly return to the idea that a child’s symptoms are not isolated. Food, the gut, the immune system, the nervous system, hormones, sleep, stress, and brain health all influence one another.
That is why this episode is so valuable for parents who feel like they have tried everything. It does not reduce picky eating to discipline, and it does not blame parents. Instead, it gives parents a framework for asking better questions: Could zinc be involved? Is the microbiome supported? Is the child sleeping enough? Are they moving enough? Is stress keeping their nervous system stuck in fight-or-flight? Are they absorbing nutrients? Are they being given enough agency around food?
For clinicians, this episode also reinforces the importance of listening to parents and looking for root causes. For parents, it offers practical next steps and language to bring to a pediatrician or integrative practitioner. For women, it highlights why maternal health, gut health, vaginal microbiome health, hormone transitions, and children’s health are deeply connected.
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FAQ
Yes, according to Dr. Song, children with a very narrow palate may have nutrient deficiencies or insufficiencies that can make picky eating worse. In this episode, she specifically highlights zinc as a nutrient to consider.
Dr. Song explains that zinc can influence taste preferences and sensory issues. This may be relevant for children who are sensitive to smell, texture, or the feeling of food in their mouth.
In the conversation, Dr. Song mentions picky eating, sensory concerns, frequent illness, eczema, diaper rashes that are not healing, and delayed puberty in boys as possible signs that zinc status may be worth evaluating.
Dr. Song discusses animal proteins, shellfish such as shrimp and scallops, legumes, nuts, seeds, and pumpkin seeds as zinc-containing foods.
Yes. Dr. Song shares an example of a vegetarian family using ground pumpkin seed powder in foods like soups, salads, oatmeal, and smoothies to support zinc levels.
Dr. Song describes quercetin as a zinc ionophore, meaning it may help zinc get into cells. She mentions red apples, red grapes, purple onions, capers, and watercress as quercetin-rich foods.
The gut microbiome can influence nutrient absorption, immune development, brain development, metabolic health, hormone systems, and postbiotics like GABA and serotonin. Dr. Song explains that supporting the microbiome may help kids who experience stress or anxiety around food.
Not always. Dr. Song says that if a child is eating only three foods, starting with diet may stress everyone out. She suggests that sleep and movement may be helpful places to begin because they can support the microbiome independently of diet.
This is Dr. Song’s way of helping families add more plant variety in a fun, approachable way. It may be as simple as trying a different color of a food the child already accepts, like purple broccoli.
If a child is in fight-or-flight mode, new foods or sensory experiences may feel more stressful. Dr. Song discusses belly breathing and other tools that help activate the parasympathetic, rest-and-digest state.
Dr. Brighten discusses the importance of the mother’s vaginal and gut microbiome in shaping the baby’s microbiome. She also notes that estrogen loss in menopause can decrease microbial diversity.
Dr. Elisa Song is introduced as a Stanford-, NYU-, and UCSF-trained holistic pediatrician, founder of Whole Family Wellness, creator of Healthy Kids, Happy Kids, and an integrative pediatric expert who blends conventional, functional, and holistic approaches to help children thrive.
The episode emphasizes that zinc dosing depends on age, symptoms, and individual needs. Parents should consult their child’s pediatrician or qualified healthcare practitioner before starting supplements, especially if they are considering higher doses or if their child has ongoing symptoms.
Dr. Jolene Brighten is a board-certified naturopathic endocrinologist, a Fellow of the American Board of Naturopathic Endocrinology (FABNE), a Menopause Society Certified Practitioner (MSCP), a nutrition scientist, and a certified sex counselor through the Sexual Health Alliance. As a licensed physician maintaining an active DEA license and full prescriptive authority, her educational frameworks align with leading global standards, including ESHRE and The Menopause Society. She serves as a faculty member for the American Academy of Anti-Aging Medicine (A4M), acts as the Lead Researcher for the Brighten Essentials Research Division, and is currently directing ongoing scientific research initiatives to advance clinical care standards for women navigating complex endocrinology, neurodivergence, and tissue-specific hormone sensitivities.