Back-to-School Nutrition: The Nutrients Your Kid’s Brain (and Body) Actually Need
- Jaime Heer, FNTP, RWS
- Aug 14
- 3 min read
Updated: Aug 16
New backpack? ✅
New shoes? ✅
But the thing that actually determines how your kid shows up for the school year — focused, calm, resilient to the inevitable germ-fest of a classroom — isn’t on the school supply list. It’s what’s fueling their body.
As a Functional Nutritionist, I always start with food first. Supplements are meant to fill gaps, not replace real, nourishing meals. So before we talk about anything in a bottle, let’s talk about what’s on the plate.
Here are the nutrients I focus on most for kids heading back into the routine of early mornings, long days, and a lot of asks on their little nervous systems — plus where to find them in food.
Omega-3s (EPA & DHA) — for a brain that’s ready to learn
Omega-3s are structural building blocks for the brain, and they play a role in focus, mood, and learning. Most kids simply don’t get enough from diet alone.
Food sources:
Wild salmon & tuna
Walnuts & walnut butter
Chia & flax seeds (add to pudding & smoothies)
Eggs (however you like them!)
Gut-Supportive & Fermented Foods — because focus starts in the gut
The gut-brain connection is real, and a well-supported microbiome plays a role in mood, immune resilience, and even attention. This is one of the most overlooked pieces of a “focus and immunity” conversation.
Food sources:
Plain yogurt w/ berries & a bit of honey
Kefir smoothies
Pickled veggies & sauerkraut
Miso stirred into broth & ramen
Fresh sourdough
Download my handy Nutrients & Foods for Kids Fridge Flyer!
Magnesium & B Vitamins — for a nervous system that can actually wind down
Kids’ nervous systems take on a lot — new teachers, new social dynamics, more hours awake and “on.” Magnesium and B vitamins support calm regulation, restful sleep, and healthy neurotransmitter production (the stuff that helps mood and focus).
Food sources:
Roasted pumpkin seeds
Leafy greens & Spinach (blend into smoothies or sauces)
Banana
Avocado
Eggs (anyway you like them)
Grass-fed meatballs, burger patties, meat sauce
Chicken & turkey
Wild salmon
Grass-fed cheese & yogurt
Nut butters
Beans & lentils
Vitamin D, Zinc & Iron — for showing up (and staying well) all year
These three are foundational for immune resilience and cognitive function — and they’re also some of the most common gaps I see, especially once kids head back into indoor, germ-filled classrooms.
Food sources:
Outside playtime
Wild caught fish sticks
Grass-fed butter on veggies & popcorn
Cheese & yogurt
Egg bites & frittatas
Mushrooms in pasta sauce
Ground beef or turkey tacos
Roasted pumpkin seeds
Black bean or lentil quesadillas
Hummus w/ veggies
Spinach in sauces & smoothies
Lentil soups or mixed w/ rice
Stay Hydrated!
Filtered water (+ electrolytes)
Popsicles made w/ real fruit + coconut water
Herbal tea
Bubbly water
When Food Needs a Little Backup
Even with the best intentions (and the pickiest eaters), it’s tough to hit every one of these nutrients through food alone — especially during a busy school year. That’s where I like to bring in targeted, high-quality support — never as a replacement for real food, but as a bridge for the gaps.
I’ve put together my go-to Back-to-School lineup covering these exact nutrients:
As always, these are practitioner-grade products I trust and use with my own clients — never a replacement for real food, just a little extra support where it’s needed most.
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