Cramps in the calf or foot can become a real and extremely painful burden - especially if they happen regularly.
Nocturnal cramps, which deprive those affected of sleep, are particularly feared.
When looking for the causes, you quickly end up with a magnesium deficiency.
Taking the mineral is supposed to prevent cramps or at least reduce their frequency. Magnesium is also said to have a positive effect on diseases such as migraines, cardiac arrhythmias or even ADHD. But what can magnesium supplements actually do and how many people are affected by a deficiency?