Magnesium 

Magnesium supplements alleviate symptoms of stress and tension. Magnesium is an agonist of gamma-aminobutyric acid (GABA) and a natural antagonist of N-methyl-D-aspartic acid – an activator of the neuronal NMDA receptor. This receptor conducts sodium, potassium, and calcium cations. Magnesium inhibits the release of catecholamines in neural synapses and reduces nervous system excitability. Supplementation with this element (500 mg daily for 8 weeks) improves both subjective and objective sleep parameters.among otherssuch as sleep latency, sleep duration and efficiency, plasma renin, melatonin and cortisol concentrations.