Because of the benefits that each of its ingredients provides: 

Magnesium helps reduce tiredness and fatigue, maintain healthy bones and teeth, support muscle function, and support the nervous system …

Zinc strengthens the immune system, supports its proper functioning and the metabolism of macronutrients, and protects bones, skin, hair, nails, and vision. It also helps maintain normal testosterone levels in the blood .

Vitamin B6 helps with protein and glycogen metabolism, as well as energy production. It also supports psychological function and the proper functioning of the immune system.