Natural ingredients have been a source of medicine since ancient times. Research on the development of natural ingredients as medicinal ingredients has increased. One of these is isolating active substances from herbs in a pure state (isolate). However, some problems hinder the use of isolates as the primary treatment option, one of which is solubility. Most isolates had poor solubility, inhibiting the body's absorption process. This review investigates the method and polymer to increase the solubility of isolates and summarizes the development of drugs from isolates. This review also explains how effectively the method and polymer improve the solubility or dissolution of the isolate. We expect the results to be a reference for research on isolates with poor solubility.