Magnesium and Stress: What the Evidence Actually Says

Magnesium contributes to normal psychological function and to a reduction of tiredness and fatigue. But social media has taken that further, claiming magnesium cures stress and anxiety. Here's what the evidence actually says.

What magnesium does

Magnesium is involved in over 300 enzyme reactions, including energy production, muscle function and the nervous system. The NHS lists it as essential for bone health, muscle function and energy metabolism. Magnesium contributes to normal psychological function, which means it's needed for your brain and nervous system to work normally.

The stress question

There is no authorised UK health claim linking magnesium to stress reduction or anxiety relief. Some small studies have explored whether magnesium supplementation might help with stress symptoms, but the evidence is not strong enough for regulators to authorise a claim. We don't make that claim.

Why people feel a link

Chronic stress may increase magnesium excretion, creating a cycle where low magnesium and stress reinforce each other. Some people report feeling calmer when they start supplementing, but this is anecdotal, not proven.

Food first

The BDA recommends getting magnesium from food first: wholegrains, leafy greens, nuts, seeds, beans and lentils. A handful of almonds gives about 75mg. Pumpkin seeds are one of the best sources, with 150mg per 30g. The UK RNI is 300mg a day for men and 270mg for women.

When a supplement makes sense

If your diet regularly falls short of magnesium-rich foods, a supplement can top up your intake. We use magnesium bisglycinate, which is well-tolerated and provides 120mg of elemental magnesium per capsule. It complements a varied, balanced diet. It doesn't replace it, and it isn't a treatment for stress.

If stress is affecting your daily life

Speak to your GP. In England you can refer yourself to NHS Talking Therapies for free, without seeing a GP first. If you ever feel you can't cope or are in crisis, call NHS 111 or Samaritans on 116 123. No supplement replaces real support.