Liquid natural Zinc plays many roles in metabolism including being required for the function of approximately 300 different enzyme systems. Therefore Zinc deficiency can impact virtually any and every metabolic process in the body with the following organ systems being the most studied: epidermal (skin) , gastrointestinal, central nervous system, immune , skeletal and reproductive systems . Finally, numerous, large - scale studies indicate that the majority of the population does not consume even the recommended daily allowance levels of Zinc.