Natural extracts are the source of many antioxidant substances. They have proven useful not
only as supplements preventing diseases caused by oxidative stress and food additives …

Flavonoids are a class of natural substances present in plants, fruits, vegetables, wine,
bulbs, bark, stems, roots, and tea. Several attempts are being made to isolate such natural …

Coronaviruses are responsible for a growing economic, social and mortality burden, as the
causative agent of diseases such as severe acute respiratory syndrome (SARS), Middle …

The outbreak of Covid-19 disease caused by SARS-CoV-19, along with the lack of targeted
medicaments and vaccines, forced the scientific world to search for new antiviral …

Flavonoids are widely distributed as secondary metabolites produced by plants and play
important roles in plant physiology, having a variety of potential biological benefits such as …

Quercetin, a naturally occurring dietary flavonoid, is well known to ameliorate chronic
diseases and aging processes in humans, and its antiviral properties have been …

Several months ago, an outbreak of pneumonia of unknown aetiology was detected in
Wuhan City (China) and the aetiological agent of the atypical pneumonia was isolated by …

Quercetin, a ubiquitous flavonoid that is widely distributed in plants is classified as a
cognitive enhancer in traditional and oriental medicine. The protective effects of quercetin for …

The rapid outbreak of coronavirus disease 2019 (COVID-19) has demonstrated the need for
development of new vaccine candidates and therapeutic drugs to fight against the …

Abstract Quercetin (3, 3ʹ, 4ʹ, 5, 7-pentahydroxyl-flavone) is a flavonol, and it belongs to a
class of plant secondary metabolites known as flavonoids. It is present in man's daily diet …