GNC fulfills its commitment of excellence to you by ensuring that only products of the highest quality reach you, the consumer. For us, each and every step matters to ensure that what you consume under the GNC brand enables you to live well. 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. Reduces stress & fatigue. Promotes relaxed and restful sleep. Soothes the nerves. Helps boost immunity.