**Preface to "Organic Polymers for Encapsulation of Drugs, Food Ingredients and Agrochemicals"**

Active compounds (e.g., drugs and food ingredients) help to improve the quality of life around the world. In order to increase the effectiveness in each intended application, research groups have worked under the motivation of demonstrating that the encapsulation helps protect guest compounds against premature degradation and can enhance their transport in aqueous medium, increasing the percentage of substance that is available for a biological action in a controlled manner over time. For that purpose, the encapsulation of guest molecules has been accomplished using organic polymers (natural, synthetic, and semi-synthetic chains) as platforms. This is an interesting topic in which the scholars have designed systems that reach the desired efficiency reducing side effects and/or contamination derived from the overuse of active compounds. Hence, this reprint aims to provide an update regarding this topic. The content may be helpful for the colleagues and students working on encapsulation of active compounds.

The contribution of all authors to this collection is deeply appreciated. It is important to highlight the active participation of the reviewers and staff of the section "Polymer Networks". They were key persons who helped complete this Reprint Book.
