SydenC Pluz - Vitamin C (Sodium Ascorbate) Plus Zinc (Zinc Sulfate Monohydrate) 
Vitamin C as Sodium Ascorbate was found to improve components of the human immune system. 
Zinc undernutrition or deficiency was shown to impair cellular mediators of innate immunity. 
 
Both Vitamin C and Zinc nutrients play an important role in immune function and the modulation of host resistance to infectious agents, reducing the risk, severity, and duration of infectious diseases. 
-karger.com