The card does not describe a combined effect of thyme and vitamin C. It calls wild thyme an aromatic plant traditionally used in herbal preparations and in cooking, and it links vitamin C with the normal function of the immune system and protection of cells from oxidative stress; these claims have no confirmation. The product is not a medicinal product.
General information (not a manufacturer's instruction): the syrup is not a substitute for treatment or for a varied diet, and the exact vitamin C content is given on the packaging.