In succession of <Nutrilan> which was out on sales in March 2001, Yungjin introduces sales of restorative tonics <Diarilan> and <Immunilan> January 2004. 
In the early stages of restorative drinks, the main purposes for most of the products were simply to supply nutrition. However, these tonics have improved to help cure diseases and are being developed in the characteristics of holding the medical treatment according to each malady. <Diarilan> which have been put on sales recently is a product that consists of components that helps diabetes patients in controlling sugar in the blood. <Immunilan> is the first immune restoration tonic to be introduced in Korea which contains components to help strengthen the immune system for the seriously ill with low immunity.