**Preface to "Screening, Identification, and Quantification of Nutritional Components and Phytochemicals in Foodstuffs"**

The interest in nutritional components, bioactive compounds, and phytochemicals in potential functional foods continues to grow, powered by the identification of health-promoting properties and potential applications of nutraceutical substances. These products may range from isolated nutrients, agri-foods, dietary supplements, and diets to genetically engineered foods, herbal products, and processed foods.

In recent years, nutraceutical foods, food supplements, herbal preparations, plant foods, and derived products have become very attractive to the food industry, prompting their use as replacements for synthetic chemicals and nutraceuticals, but neglected and underutilized plant resources are suffering from less attention and research, and their nutritional, economic, and socio-cultural potentials are not fully exploited. The identification and quantification of nutritional substances and bioactive compounds in foods and the evaluation of their biological activities are important to gauge their efficacy as dietary interventions and in healthy applications.

This book provides readers with a good overview of the status and exciting developments in this field. It includes papers focused on modern analytical instrumentation and new methods and biological tests applied to the evaluation of plant foods, derived products, herbal products, and food supplements and the phytochemical characterization of innovative natural sources of bioactive compounds and relative health-promoting properties.

The guest editor would like to thank all the colleagues and contributors that published their works in this Special Issue, as well as the reviewers that evaluated the submissions, assuring the high quality of the published studies. The guest editor would also like to thank the publisher, MDPI, and the editorial staff of *Foods* for their high-quality, constant, and professional support as well as for their invitation to edit this Special Issue.

> **Dario Donno** *Editor*
