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Magnesium deficiency is often a precursor to sleep disorders, such as anxiety, hyperactivity and restlessness. Itâs been suggested that this is because magnesium is vital for GABA function, an inhibitory neurotransmitter known to âcalmâ the brain and promote relaxation.
1 Folic Acid: Deficiency in folic acid deficient can be found in those with insomnia. 2  Important Minerals: Calcium and Magnesium, taken in a 2:1 ratio, can be helpful for sleep.  Calcium: is a natural relaxant which has a calming effect on the nervous system.