I Like It CLEAN Zinc contains 7.5 mg of elemental zinc (as zinc sulfate) per recommended daily dose of 2 ml. Zinc is an essential trace element for the body, which the human body cannot produce on its own. Among other things, it is necessary for maintaining a normal immune system. The human body contains approximately 4 g of zinc, which is essential for growth and proper metabolic function. Zinc is found in all organs, as well as in erythrocytes (red blood cells) and leukocytes (white blood cells). Bones, skin, hair, nails and reproductive organs have a particularly high zinc content. Over 200 enzymes have been scientifically confirmed to depend on zinc: no other micronutrient is more important for the formation of enzymes, without which many important reactions in the body would occur very slowly or not at all.