Magnesium supports energy metabolism, plays a part in the proper course of mental (psychological) functions and helps reduce fatigue. Zinc helps maintain normal plasma levels of testosterone and takes part in the proper metabolism of macronutrients. Iron affects the functioning of the immune system and the cognitive functions and reduces fatigue. Vitamin A is involved in maintaining the proper condition of the skin and mucous membranes, vitamin B6 regulates hormonal activity and vitamin B12 supports metabolic processes and synthesis of red blood cells. Copper protects DNA proteins and lipids from oxidative damage.