An Overview of a Versatile Compound: Quercetin

Abstract

Flavonoids are phytochemical compounds found in a variety of plants, fruits, vegetables, leaves, and barks, it offers a wide range of health benefits. Quercetin is a polyphenolic flavonoid that is found in onions, apples, berries, broccoli, grapes, nuts, cherries and many other food products. Pharmacologically, quercetin has been examined for various disorders and is reported to possess the ability to prevent as well as treat them. It possesses anti-oxidant, anti-allergic, anti-inflammatory, anti-viral and anti-cancer activity as well. Developing suitable formulation for the delivery of quercetin to specific site leads to better compliance and effective treatment of the disease. This review article highlights the beneficiary activities exhibited by quercetin along with the mechanism behind its activity, followed by reporting the different quercetin formulations developed in last few years.

Antibacterial and Chemical Characterization of Silica-Quercetin-PEG Hybrid Materials Synthesized by Sol–Gel Route

“…They belong to a class of secondary metabolites having a polyphenolic structure, widely found in the plant kingdom. In particular, flavonoid compounds can be found in several parts of the plants, such as fruits, leaves, stems, bark roots, and flowers [1,2]. Flavonoids are divided into several groups depending on the modifications of the central C-ring.…”

“…Flavonoids are divided into several groups depending on the modifications of the central C-ring. There are six different subclasses, such as flavones, flavonols, flavanones, flavanols (catechins), anthocyanidins, and isoflavones [1,3]. Among the flavonol subclass, quercetin is the main and the most thoroughly studied due to its anti-allergic, anti-bacterial, anti-oxidant, antiviral, anti-inflammatory, and anti-carcinogenic properties [1].…”

“…There are six different subclasses, such as flavones, flavonols, flavanones, flavanols (catechins), anthocyanidins, and isoflavones [1,3]. Among the flavonol subclass, quercetin is the main and the most thoroughly studied due to its anti-allergic, anti-bacterial, anti-oxidant, antiviral, anti-inflammatory, and anti-carcinogenic properties [1]. The beneficial properties of this compound are due to the chemical structure, especially for the presence and location of the hydroxyl (-OH) substitutions and the catechol-type B-ring.…”