Sleep Aid is a dietary supplement containing gamma-aminobutyric acid, melatonin, and plant extracts. The product has been enriched with zinc, magnesium, vitamin B6 and calcium. The modern world is full of stress and fight for its future. The result of everything is frequent circadian rhythm disturbances, which translate into constantly deteriorating well-being. Unfortunately, athletes often pay for this fact with deterioration of condition, decreases in muscle mass and general breakdown. The introduction of this preparation to supplementation will certainly help in internal calm down after a hard day and reduce tiredness and fatigue. Zinc contributes to the maintenance of normal metabolism of macronutrients and fatty acids. Zinc also helps maintain normal carbohydrate metabolism, proper protein synthesis, maintain healthy bones and maintain normal blood testosterone levels. It helps in the proper functioning of the immune system and in the protection of cells against oxidative stress. Magnesium contributes to the reduction of tiredness and fatigue, maintains normal energy metabolism, as well as helps in the proper functioning of muscles, and proper protein synthesis. Vitamin B6 helps in the proper functioning of the immune system and contributes to the maintenance of normal energy metabolism. Calcium contributes to maintaining normal energy metabolism. It helps in the proper functioning of muscles and digestive enzymes. Calcium is involved in the process of cell division and specialization, and is also needed to maintain healthy bones and teeth.