Sustenium Immuno is a food supplement for the period before and during winter, the change of seasons and periods of common colds and other infections, as its composition contributes to:    in the normal functioning of the immune system.  in reducing tiredness and fatigue.  in protecting cells from oxidative stress.  in the normal functioning of metabolic processes aimed at energy production.  Contains Glycine, Glutamine, Vitamins and Zinc.    Orange flavored.