What every parent should know about magnesium for kids’ anxiety
Magnesium is one of the most talked-about supplements for children with anxiety — and for good reason. It’s involved in over 300 biochemical reactions in the body, including many that directly regulate the nervous system and stress response.
Why magnesium matters for anxious children
The nervous system relies on magnesium to function properly. It regulates neurotransmitters including GABA, which is the brain’s main calming neurotransmitter. When magnesium levels are low, the nervous system becomes more “excitable” — more reactive to stress, more prone to anxiety, and less able to settle at night.
Studies have shown that children with ADHD and anxiety often have lower magnesium levels than their peers. Several randomised controlled trials have found that magnesium supplementation can meaningfully reduce anxiety scores in children.
Why many children are deficient
Modern diets are often low in magnesium. The richest sources are leafy greens, nuts, seeds, and legumes — foods many children don’t eat in large quantities. Processed food consumption, high sugar intake, and stress itself all deplete magnesium further.
The different forms — and which to choose
Magnesium glycinate — Best for anxiety and sleep. Highly bioavailable and very gentle on the digestive system. This is the form most commonly recommended for children with anxiety.
Magnesium citrate — Good bioavailability. More commonly used for constipation. Not ideal as a first choice for anxiety.
Magnesium oxide — Poor bioavailability. Found in many cheap supplements. Avoid this one.
Magnesium malate — Good option, particularly if fatigue is a concern alongside anxiety.
What to look for when buying
- Check the form of magnesium (glycinate or citrate preferred)
- Look at the “elemental magnesium” content on the label
- Choose brands that use third-party testing
- Powder formats are often easier to give to children than capsules
Magnesium isn’t a magic cure for anxiety. But for many families, it’s a gentle, evidence-supported tool that can take the edge off. Always speak with your child’s GP before starting any new supplement, especially if your child is on other medications.
