With the onset of cold weather and the beginning of the season of acute respiratory viral infections (SARS), many of us begin “race” race with a cold. In the course are various means to prevent and control ARVI, in order to strengthen immunity and provide him with the strength to defeat the viruses. In search of a reliable and safe way to protect against influenza and other ARI who rely on the advice of a neighbor or call relatives and friends, others – trust their intuition, and some are sent immediately to the pharmacy on the advice of the pharmacist. However, few of us actually pay much attention to the study of the composition of the product, which buys as a helper in the season of colds. And in vain, because it determines the safety of the means.