Picky Eaters: When to Worry About Nutrition

Dr Nick Fuller
Leading Obesity Expert at the University of Sydney and founder of Interval Weight Loss.

Picky eating is just one of those phases kids go through—it’s normal and, let’s be honest, relatable. Studies say almost half of toddlers and preschoolers are picky eaters, turning their noses up at new foods or sticking to the same handful of favourites. It’s a part of growing up—testing boundaries and figuring out what they like.
But here’s the thing: there’s a difference between a fussy eater who skips the broccoli and one whose diet leaves them missing out on important stuff like iron or calcium. If your child’s plate rarely sees variety or skips key food groups, it’s worth taking a closer look. A lack of essential nutrients can lead to problems like low energy, weaker immunity, or slower growth—and nobody wants that for their kid.
This guide will walk you through spotting the signs of nutrient gaps, understanding why balanced meals matter, and finding smart ways to tackle picky eating without turning mealtime into a battle.
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Why Nutrition Matters For Picky Eaters
A balanced diet is the backbone of your child’s growth, learning, and energy. But picky eaters can make it tricky to tick all the boxes. A limited diet often means missing out on the essentials, and that can take a toll. Here’s why it’s important:
- Iron for brain power: Supports focus and cognitive development.
- Calcium and vitamin D for strong bones and teeth: Especially crucial during those big growth spurts.
- Balanced nutrients for energy and immunity: Keeps kids active and less prone to illnesses.
Skipping these nutrients can lead to developmental delays, weaker immunity, and even moodiness or lack of focus.
Signs Your Picky Eater Have Nutritional Deficiency
While picky eating is common, it’s important to know when it’s more than just a phase. Some signs that your child might not be getting the nutrients they need are:
- Unexplained Fatigue or Low Energy: Children who lack iron or other essential nutrients often appear unusually tired.
- Slow Growth or Weight Gain: Nutritional deficiencies can result in poor physical development over time.
- Persistent Irritability or Mood Swings: Low levels of nutrients like vitamin B12 or magnesium may affect mood regulation.
- Weak or Brittle Nails and Hair: These can signal a lack of protein, zinc, or essential fatty acids.
- Pale Skin or Recurring Illnesses: A weak immune system could be a sign of insufficient vitamins and minerals.
If these symptoms persist, consult a healthcare provider or dietitian for guidance.
Ways to Deal with Picky Eater to Fulfil Nutritional Deficiency
It’s possible to support your child’s health with practical strategies that address their picky eating habits. Below are some ways to make sure your child gets the nutrients they need.
Gradual Introduction of New Foods
Introducing new foods doesn’t have to feel like a battle. Start with small portions of new items alongside their favourites. Avoid pressuring them to eat; instead, let them explore the food at their own pace. Over time, familiarity often leads to acceptance.
Incorporate Nutrient-Dense Foods
Choose foods that pack a nutritional punch, even in small quantities. Examples include avocado, eggs, nuts, seeds, and beans. Incorporate these into meals they already enjoy, like adding grated carrots to spaghetti sauce or blending spinach into a fruit smoothie.
Looking for creative ways to sneak nutritious foods into their diet? Click here for some examples to get started.
Creative Food Presentation
Kids eat with their eyes first, so why not make their plates a mini masterpiece? Bright, colourful ingredients can work wonders—think rainbows of veggies or fruit skewers that look like magic wands. Got cookie cutters? Use them to turn sandwiches, pancakes, or even cheese into stars, hearts, or animal shapes.
Want to go all out? Turn their snacks into cute characters or fun patterns. It’s not just food; it’s an adventure waiting to be eaten.
Maintain a Routine
Children thrive on consistency. Set regular meal and snack times to help them develop healthy eating habits. A structured routine reduces grazing and ensures they’re hungry when it’s time to eat.
Involve Children in Meal Prep
Kids are more likely to try foods they’ve helped prepare. Let them pick a vegetable at the store or assist with simple tasks like mixing, washing, or assembling. This hands-on approach builds their curiosity about food.
Repetitive Food Exposure
Research shows that repeated exposure to new foods increases the chances of acceptance. Serve it in fun, different ways or pair it with something they already love. They might say no a few times, but stick with it! Familiarity works wonders, and before you know it, they might just surprise you with a bite—and maybe even a smile.
Minimise Mealtime Distractions
Turn off the screens, stash the toys, and let the table be all about the food. A calm, focused vibe helps kids pay attention to what’s on their plate and listen to their tummies—are they hungry, full, or somewhere in between?
With fewer distractions, they’re more likely to enjoy their meal and learn to eat mindfully. Plus, a peaceful setup makes mealtime feel like a positive, stress-free part of the day—something everyone can look forward to.
Curious about how screen time impacts your child’s health? This article dives into the effects of screen use and offers tips on promoting healthier habits at mealtimes.
Offer Small Portions
Serving small portions of new foods can make the experience less overwhelming for picky eaters. They’re more likely to try a small bite when it doesn’t feel like a big commitment. This also prevents them from feeling pressured to eat more than they’re comfortable with. Gradually increasing the portion size as they get used to the food can help build their confidence and willingness to try more.
Practice Patience and Avoid Pressure
Forcing or bribing children to eat can backfire and create negative associations with food. Instead, maintain a calm and patient attitude. Celebrate small wins, like taking a single bite of something new. This approach allows your child to develop a more positive attitude towards food and mealtimes. Encouragement without pressure helps them feel more in control, fostering a healthier relationship with food in the long run.
Use Mealtime Games and Themes
Make eating fun by turning meals into games. For example, challenge your child to ‘taste the rainbow’ by trying colourful fruits and veggies. Themed dinner nights can also add excitement to mealtimes. Introducing games like food-based challenges can spark their curiosity and make the experience more enjoyable. Creating a playful environment helps reduce mealtime stress and encourages them to try new foods with a sense of adventure.
Want more creative ways to make mealtimes enjoyable? Check out this article for tips on turning healthy eating into a fun family activity!
Create a Positive Mealtime Atmosphere
Model healthy eating habits by enjoying a variety of foods yourself. Keep mealtime conversations light and pleasant to make eating together an enjoyable experience for everyone. Positive reinforcement helps reinforce healthy habits and encourages children to emulate your eating choices. Sharing mealtimes as a family also strengthens emotional connections, making food a source of enjoyment and not just a task.
Consult a Dietitian
If your efforts don’t seem to be working, or if you’re concerned about your child’s health, consult a dietitian. They can provide personalised advice and recommend supplements or other strategies to address specific needs. A dietitian can also help you identify potential food sensitivities or intolerances that might be contributing to picky eating behaviours. Their expertise can ensure your child receives the right nutrition to support their growth and development.
Summing Up
Supporting your picky eater’s nutrition doesn’t have to be a struggle. By using strategies like repetitive food exposure, minimising distractions, and making mealtimes fun, you can help your child develop a healthier relationship with food. With patience and creativity, you can ensure they’re getting the nutrients they need to grow and thrive. Don’t be afraid to seek professional advice when needed – every small step you take will make a big difference in their long-term health.
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Meet Dr Nick Fuller
My Story
As a father, I know first-hand that raising healthy and happy children is tricky. Children are fussy, particularly at the end of the day when they are shattered. We also live in a society where companies seek to profit from what we feed our kids; incorrect and damaging advice is pushed on us and marketed towards our children, and we have no time.
But with these recipes and resources, you and your children can enjoy simple and well-founded food and lifestyle choices for lifelong health.

About Dr Nick Fuller
Dr Nick Fuller is the founder of Interval Weight Loss and is a leading obesity expert at the University of Sydney with a Ph.D. in Obesity Treatment. Dr Fuller is also the author of three best-selling books and his work been published in top ranked journals in the medical field, including JAMA, Lancet and American Journal of Clinical Nutrition.