Functional drinks, in liquid form, are mostly produced by the cosmetic industry for the improvement of moistureretaining
properties of the skin and wrinkles prevention by boosting collagen levels. Collagen drinks, originating from Asian
countries such as Japan and China as well as from the USA (Lotte collagen, Colla-plus, Meiji and Shiseido, among others)
are sold as a liquid beauty elixir.