**Preface to "Plant Therapeutics"**

This Special Issue provides recent advances in the use of plants for therapeutic purposes. This Special Issue collected the plants, including leaf, fruit, and others. This Special Issue's targets were crude plant extract and active principle purified from the plant. These studies were evaluated by the journal's regular review process, and we are pleased to publish the qualified results in this Special Issue. Additionally, we divided them into three sections: the first section contains eight reports on plant crude extracts, the second section includes seven reports on the pure compounds from plant, and the third section shows two review articles.

Plants used for therapeutic purposes are classified as preliminary in modern terms. Humans used the plant as a nutrient and/or medicine prior to the purification of active principles. Physicians in the emergency room criticized the herbal product's slow onset time. It aided in the development of a chemical agent derived from the plant. However, agents derived from the plant must adhere to the fundamental principle that the plant in question is effective in therapeutics. Unfortunately, records demonstrating the effectiveness of a plant or herb were not passed on in a positive manner. Records indicating the effectiveness of plants were kept in traditional Chinese medicine. However, the herbal mixture was the main attraction. As a result, the benefits of plants were mostly determined by local custom rather than scientific evidence.

This problem prompted researchers to provide each plant discovery. We are pleased to include in this Special Issue the screened Mexican plants and the halophytic plants growing in central Saudi Arabia. We are also pleased to have a review article from Iran identifying active principles and plants for Triple Negative Breast Cancer (TNBC). Another review article from Bangladesh will be very useful to researchers interested in renal disorders.

As a result, we have sparked scientists' interest in studying the plant for therapeutic purposes. This field necessitates network pharmacology analysis and machine-aided learning. Many disorders resistant to modern medication are looking for active principles isolated from the plants all over the world.

> **Juei-Tang Cheng, I-Min Liu, and Szu-Chuan Shen** *Editors*
