Adequate sleep plays a large role in health. Not getting enough sleep has been linked to developing diabetes heart disease obesity lower immunity levels and depression. Adults need about seven to eight hours of sleep per night. Let's make the necessary changes to ensure an adequate amount of sleep. on a regular basis. GNC Zinc Magnesium Amino Complex contains hops flower extract L-Theanine L-Tryptophan Vitamin B6 Zinc and Magnesium as the major ingredients. Magnesium is necessary for nerve function and zinc has a calming and anti-depressant effect. Hops Flower Extract is an age-old traditional remedy to help with sleep problems. L-Tryptophan L-Theanine & Vitamin B-6 are considered to be sleep supporting amino acids.