Linfoflu® vials is a black cherry flavored food supplement containing Resveratrol from Polygonum cuspidatum, Beta-glucan, L-Arginine, Zinc and folic acid. Beta-glucan is a purified polysaccharide extracted from baker’s and brewer’s yeasts (Saccharomyces cerevisiae). Resveratrol is a polyphenol produced by several plants such as skin of red grapes, blueberries, raspberries, mulberries and is also present in the roots of Polygonum cuspidatum. Arginine is a semi-essential amino acid but, unlike adults, children are unable to synthesize it effectively so for them arginine becomes essential. Zinc is fundamental for the immune system functions. Folic Acid (or vitamin B9) naturally occurs in dark green leafy vegetables, legumes and eggs but 50% of it is lost after cooking.