What are the symptoms of magnesium deficiency?

Not having enough magnesium in your system can cause troubled sleep and even insomnia. Studies in mice have shown that optimal levels of this mineral are needed for normal sleep and that both high and low levels can cause sleep problems.Insomnia is a common symptom of magnesium deficiency. People with low magnesium often experience restless sleep, waking frequently during the night. Maintaining healthy magnesium levels often leads to deeper, more sound sleep.