Propolis C-1 is a nutritional supplement based on propolis extract of high biological value and vitamin C. Propolis is a natural mixture of resinous substances, which honey worker bees (Apis mellifera) collect from different plant sources, such as buds, leaves or plant juices. and then they mix them with beeswax and other secretions. Propolis is of great importance for bees, because it protects the hive from bacterial, viral and fungal infections, thanks to its antimicrobial effect. However, it is no less important to people, because data shows that they have used it as a folk medicine since ancient times. Propolis has recently regained its popularity in the world and in our country, where the growth of the use of natural products in the therapy and prevention of various diseases has been recorded.