Preface

Although B-complex vitamins have been extensively studied, novel sources, updated intake values and chemical compositions, and their role in numerous diseases are still being discovered. The objective of this book is to provide the most up-to-date information on the effects of vitamin B deficiency from retrospective, perspective and prospective points of view. Specific chapters have been written to describe as well as the roles of niacin (vitamin B3), pyridoxine (vitamin B6), folate (vitamin B9), and vitamin B12 in numerous disorders. The book also presents novel applications of B-complex vitamins, such as thiamin in patients with critical conditions, dietary supplements in the prevention of renal stones, and treatment of COVID-19.

This book project contains twelve chapters dealing with different aspects of B-complex vitamins including their sources, intakes and novel applications.

This multi-topic book is divided into two sections. The first section comprises nine different chapters discussing sources, intakes and deficiencies of B-complex vitamins while the second section consists of three chapters discussing the novel applications of B-complex vitamins.

> **Jean Guy LeBlanc** CERELA-CONICET, San Miguel de Tucuman, Argentina
