Magnesium for Kids: Everything You Need to Know Before You Buy
It’s the most talked-about supplement for anxious children. Here’s what the science actually says.
Magnesium is the supplement I get asked about more than any other. And for good reason — the research on magnesium and anxiety, sleep, and nervous system regulation is genuinely compelling.
But not all magnesium is created equal. And buying the wrong kind is money down the drain. Here’s everything you need to know.
Why Magnesium Matters
Magnesium is involved in over 300 enzymatic reactions in the body. Among its most important roles: regulating the stress response, supporting the production of GABA (the brain’s calming neurotransmitter), and supporting sleep.
Studies suggest that a significant proportion of children are not getting adequate magnesium through diet alone — and that deficiency is associated with increased anxiety, irritability, and sleep difficulties.
The Different Types — and Why It Matters
Magnesium glycinate
This is the one I recommend most. The glycinate form is highly bioavailable (meaning the body actually absorbs it) and has the added benefit of glycine — an amino acid with its own calming effects. It’s the gentlest on the stomach and most effective for anxiety and sleep.
AFFILIATE LINK PLACEHOLDER — Kids magnesium glycinate powder — unflavoured: [INSERT KIDS MAGNESIUM GLYCINATE UNFLAVOURED AFFILIATE LINK HERE]
AFFILIATE LINK PLACEHOLDER — Kids magnesium glycinate gummies: [INSERT KIDS MAGNESIUM GLYCINATE GUMMIES AFFILIATE LINK HERE]
Magnesium citrate
Well absorbed and cheaper than glycinate, but has a laxative effect at higher doses. Fine in small amounts, but not the first choice for regular daily use in children.
Magnesium oxide
Very poorly absorbed. Often found in cheap supplements. Not recommended.
Magnesium threonate
A newer form that crosses the blood-brain barrier. Promising research for cognitive function and anxiety, but expensive and less available in child-appropriate doses.
Dosing
Children’s dosing is typically 80-130mg of elemental magnesium per day depending on age. Always check with your paediatrician before starting any supplement. Start low and build up — and don’t exceed recommended doses.
When to Give It
For sleep and anxiety, giving magnesium 30-60 minutes before bed is most effective. For general daily support, with dinner is fine.
How Long Before You See Results
Magnesium is not a medication. It works cumulatively, not immediately. Most families report noticing a difference after 2-4 weeks of consistent daily use.
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