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Kids · Magnesium

Best Magnesium Supplements for Kids: 3 Options Worth Knowing About

June 16, 2026 · 9 min read

Magnesium doesn't get nearly enough attention in children's nutrition. And yet it's involved in over 300 biochemical processes in the body — from muscle function and sleep quality to mood regulation and bone development.

The problem? Most kids don't get enough from diet alone. And when they're low, the signs are easy to miss: restless sleep, muscle cramps, difficulty concentrating, irritability.

I looked into the magnesium supplement market for children specifically and found three products that stand out — each for different reasons. Here's what I found.

Why Magnesium Matters for Children

Magnesium plays a role in:

  • Sleep and relaxation — it regulates neurotransmitters that calm the nervous system
  • Muscle function — including reducing cramps and tension
  • Bone and teeth development — works alongside calcium and vitamin D
  • Energy metabolism — helps convert food into usable energy
  • Psychological function — mood, focus and stress response

Children aged 4–8 need around 130 mg of elemental magnesium per day. Older children need more. Many fall short, especially picky eaters.

What I Look For in a Kids' Magnesium Supplement

  • Form — citrate and bisglycinate are the most bioavailable and gentlest on the stomach
  • Elemental magnesium dose — not the compound weight, but how much actual magnesium is delivered
  • No artificial colours or preservatives — unnecessary in a children's supplement
  • Format — gummies, drops or powder; compliance matters with kids
  • Third-party testing — especially important for supplements aimed at children

3 Best Magnesium Supplements for Kids

Maxmedix Magnesio Citrato per Bambini — 90 vegan gummies

Best value · 3-month supply

#1 — Maxmedix Magnesio Citrato per Bambini, 90 Gommose Vegane

90 gummies · 80 mg elemental magnesium (citrate) · ages 3–12 · vegan, gluten- & lactose-free · forest fruits + apple

Maxmedix has been in the supplement space since 2010, and their Kids' Magnesium Citrate Gummies are one of their most established children's products.

Each gummy delivers 80 mg of elemental magnesium from magnesium citrate — a highly absorbable form that's also gentle on digestion. 90 gummies means one per day for a full 3-month supply. That's genuinely good value.

Designed for ages 3 to 12. Vegan, gluten-free, lactose-free, non-GMO. Forest fruits and apple flavour — a combination that goes down well with younger kids. GMP-manufactured. Magnesium citrate is the only active ingredient — no unnecessary extras.

125 reviews, 4.4★, 50+ sold in the past month. Quietly popular.

Best for: Parents who want a simple, clean, long-lasting magnesium supplement without extras.

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Novomins Kids Magnesium Gummies — 30 strawberry gummies

Most reviewed · Third-party tested

#2 — Novomins Kids Magnesium Gummies — 546 mg Magnesium Citrate

30 gummies · 60 mg elemental magnesium (citrate) · sugar-free · vegan, Halal, gluten/dairy/gelatine-free · strawberry from purple carrot

Novomins is a UK supplement brand with a strong reputation in the children's category. Their Kids Magnesium Gummies were voted Best Kids Vitamins 2021–2024 by Best Reviews Guide — a consistent track record that's hard to ignore.

Each gummy provides 546 mg of magnesium citrate, delivering 60 mg of elemental magnesium. 30 gummies = a one-month supply at one per day. Suitable from age 3.

Sugar-free, vegan, Halal, gluten-free, dairy-free, gelatine-free and non-GMO. No artificial colours or preservatives — the strawberry colour comes from purple carrot juice concentrate. Vegan Society certified.

Every batch is independently third-party tested and manufactured in NSF- and GMP-certified facilities — notably above average for this category.

In one brand-cited survey: 74% of parents reported better sleep and 89% reported improved mood in their children. 3,763 reviews, 4.5★, 200+ sold last month — the crowd favourite.

Best for: Parents prioritising third-party tested quality and a proven track record across thousands of reviews.

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VivoNu Magnesium Complex Drops for Kids — 60ml strawberry liquid

Best multifunctional · Liquid drops

#3 — VivoNu Magnesium Complex Drops for Kids

60ml liquid · magnesium bisglycinate + D3, K2, B12, B6, potassium, Omega-3, L-theanine, Lemon Balm & spinach · strawberry

This one takes a completely different approach. Instead of a single-nutrient gummy, VivoNu's Magnesium Complex Drops deliver a 10-in-1 formula in liquid drop form.

The actives include magnesium bisglycinate (one of the most bioavailable and stomach-friendly forms) plus Vitamin D3, K2, B12, B6, potassium, algae-derived Omega-3, L-theanine, Lemon Balm and spinach. It targets magnesium levels, calm, focus, cognitive development, immune strength and bone health in one formula.

Liquid format is practical: 1–2 ml into a favourite drink or a few drops under the tongue. No chewing required, which makes it suitable for younger children or those who refuse gummies. Strawberry flavoured.

Bisglycinate is particularly well-suited for sensitive stomachs — it doesn't cause the digestive discomfort some other forms of magnesium can.

50 reviews, 4.4★ — newest product on this list, but arguably the most comprehensive formula.

Best for: Parents who want a multifunctional formula covering magnesium, vitamins and calm-support ingredients in one daily dose — especially for children who struggle with focus or sleep.

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Quick Comparison

ProductFormElemental MgFormatRating
Maxmedix Kids Magnesio CitratoCitrate80 mgGummy (90)4.4★
Novomins Kids MagnesiumCitrate60 mgGummy (30)4.5★
VivoNu Magnesium Complex DropsBisglycinate + 9 extrasVariableLiquid drops4.4★

Which One Should You Choose?

  • Budget-conscious, long supply: Maxmedix — 90 gummies, simple formula, 3 months per pack
  • Most reviewed, award-winning: Novomins — thousands of verified reviews, 4-year consecutive award, third-party tested
  • Comprehensive multi-nutrient: VivoNu Drops — 10 ingredients, liquid format, good for kids with sleep or focus concerns

All three avoid artificial colours and are free from common allergens. The right pick depends on what you're looking for beyond the magnesium itself.

FAQ

Frequently asked questions

Common signs include difficulty sleeping, muscle cramps or twitching, irritability, poor concentration and fatigue. These can have other causes too — if you're concerned, a blood test via your child's doctor is the most reliable way to check.

Both are well-absorbed. Citrate is slightly more laxative at higher doses, which can actually help children with constipation. Bisglycinate is the gentlest option for sensitive stomachs and rarely causes digestive side effects. Both absorb significantly better than cheaper forms like magnesium oxide.

All three products on this list are suitable from age 3. Always follow the product's dosage instructions and consult your child's paediatrician before starting any supplement, especially for younger children.

Magnesium plays a role in regulating neurotransmitters involved in sleep and relaxation. Some parents notice improvements in sleep quality, particularly in children who struggle to wind down. The VivoNu drops also include L-theanine and Lemon Balm, which are commonly associated with calming support.

For healthy children, daily magnesium supplementation within the recommended dosage range is generally considered safe. The body excretes excess magnesium through urine, so toxicity from food-supplement doses is rare. Stick to the recommended dose on the label.

At normal doses, the most common side effect is loose stools — more likely with citrate than bisglycinate. If this happens, reduce the dose slightly. Severe side effects at supplement-level doses are rare.

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