Magnesium rarely gets the attention that calcium or iron do, yet it is one of the minerals children are most likely to fall short on.
According to the NIH Office of Dietary Supplements, national survey data (NHANES 2013–2016) found that nearly half of Americans get less magnesium from food than they need - and adolescents are among the groups most likely to have low intakes.
The good news: many magnesium-rich foods are ones kids already enjoy. Below, you will find how much magnesium children need at each age, the best kid-friendly food sources, and a quick no-bake energy bites recipe that delivers about 45 mg of magnesium per bite.
How Magnesium Impacts Growth in Kids
Magnesium is involved in more than 300 enzyme systems in the body. Experts point to its role in:
• Muscle and nerve function - helping muscles contract and relax normally
• Bone development - magnesium is a structural part of bone, alongside calcium and vitamin D
• Energy production - converting food into usable energy
• Protein synthesis - building new tissue during growth
Because children are growing fast, a steady daily supply from food matters.
How Much Magnesium Do Kids Need Per Day?
The Recommended Dietary Allowance (RDA) for magnesium rises with age:
Age Boys Girls
- 1–3 years 80 mg 80 mg
- 4–8 years 130 mg 130 mg
- 9–13 years 240 mg 240 mg
- 14–18 years 410 mg 360 mg
Source: NIH Office of Dietary Supplements.
Notice the jump at age 9 and again at 14. This is exactly when many kids shift toward snack foods and away from beans, nuts and whole grains - which is why the teen years are a common gap.
Best Magnesium-Rich Foods for Kids
These foods offer the most magnesium per typical serving:
- Pumpkin seeds (pepitas), roasted 1 oz 156 mg
- Chia seeds 1 oz 111 mg
- Almonds, dry roasted 1 oz 80 mg
- Spinach, boiled ½ cup 78 mg
- Cashews, dry roasted 1 oz 74 mg
- Soymilk 1 cup 61 mg
- Black beans, cooked ½ cup 60 mg
- Edamame, shelled ½ cup 50 mg
- Peanut butter 2 Tbsp 49 mg
- Brown rice, cooked ½ cup 42 mg
- Plain yogurt 8 oz 42 mg
- Banana 1 medium 32 mg
Source: NIH Office of Dietary Supplements, based on USDA FoodData Central.
Seeds and nuts lead the list by a wide margin. The challenge is getting kids to eat them - which is where the recipe below comes in.
Recipe: 5 Minute No Bake Pumpkin Seed Energy Bites
These bites combine four of the top magnesium sources - pumpkin seeds, chia, oats and peanut butter - into a snack that tastes like a cookie. No oven, no blender, and kids can help roll them.
Prep time: 5 minutes | Chill time: 20 minutes | Makes: 12 bites | Magnesium: ~45 mg per bite (estimated)
Ingredients
- 1 cup old-fashioned rolled oats
- ½ cup natural peanut butter (or sunflower seed butter for nut-free)
- ¼ cup roasted pumpkin seeds (pepitas), roughly chopped
- 2 Tbsp chia seeds
- ¼ cup honey or maple syrup
- ¼ cup mini dark chocolate chips
- 1 tsp vanilla extract
- Pinch of salt
Instructions
- Add oats, chopped pumpkin seeds, chia seeds, chocolate chips and salt to a large bowl. Stir.
- Add peanut butter, honey and vanilla. Mix until everything sticks together. If too dry, add 1 more Tbsp of peanut butter; if too sticky, add 1 Tbsp of oats.
- Chill the mixture for 15–20 minutes so it is easier to shape.
- Roll into 12 balls, about 1 Tbsp each.
- Store in an airtight container in the fridge for up to 1 week, or freeze for up to 3 months.
Tips and Swaps
- Nut-free for school: use sunflower seed butter instead of peanut butter.
- Toddlers: press the mixture flat into a pan and cut into small squares instead of balls, and chop the seeds finely. Honey should never be given to babies under 1 year - use maple syrup.
- More magnesium: swap half the chocolate chips for chopped almonds or cashews.
- Lunchbox tip: pack them frozen - they thaw by lunchtime and keep other food cool.
Magnesium estimate is based on NIH/USDA values for each ingredient and will vary by brand. Two bites provide roughly 90 mg - about 70% of the daily need for a child aged 4–8.
5 More Easy Ways to Add Magnesium to Your Child's Day
-
Peanut butter banana toast - whole wheat toast, 2 Tbsp peanut butter and half a banana adds up to roughly 85 mg.
- Black bean quesadilla - ½ cup of mashed black beans adds 60 mg to a family favorite.
- Chia yogurt parfait - stir 1 Tbsp of chia seeds into plain yogurt with berries.
- Edamame snack cup - shelled, lightly salted edamame gives 50 mg per ½ cup.
- Green smoothie - blend a handful of spinach with banana and soymilk; the fruit hides the greens.
Frequently Asked Questions
Which foods are highest in magnesium for kids?
Pumpkin seeds, chia seeds, almonds, cashews, spinach, black beans, edamame and peanut butter are the richest common sources. For picky eaters, blending seeds into energy bites, smoothies or oatmeal is often the easiest approach.
How much magnesium does a 5-year-old need?
Children aged 4–8 need 130 mg of magnesium per day. Two of the energy bites above plus a glass of milk come close to that amount.
What are the best nut-free magnesium sources?
Pumpkin seeds, chia seeds, sunflower seed butter, black beans, edamame, spinach, brown rice and bananas are all nut-free options.
Can kids get too much magnesium from food?
According to the NIH, magnesium from food does not pose a risk in healthy children because the kidneys remove the excess. Upper limits apply only to supplements and medications, so follow label directions and your pediatrician's guidance.
Are energy bites safe for toddlers?
Round, sticky bites can be a choking risk for children under 4. Press the mixture into a flat pan and cut small squares, and use maple syrup instead of honey for babies under 1.
You can check out our full blog about frequently asked questions about Magnesium here
When Food Alone Is Not Enough
Picky eaters, nut allergies and busy schedules can make it hard to hit magnesium targets through food every day.
Pediatric experts recommend a food-first approach, and a supplement can help fill the gap when diet falls short. Always check with your pediatrician before starting any supplement.
If your family needs extra support, SUNNY SAM Magnesium Gummies are made for kids, with a taste they look forward to.
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