Magnesium is found in a wide variety of foods, including spinach, nuts and wholemeal bread.
How much is safe to take?
The Department of Health and Social Care says: “Having 400mg or less a day of magnesium from supplements is unlikely to cause any harm.”
However, if you take magnesium supplements, do not take too much as this could be “harmful”, the health body warns.
According to the NHS, taking high doses of magnesium (more than 400mg) for a short time can cause diarrhoea.