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14.08.2021


Quercetin analogs provide just as much protection against viruses as quercetin itself

Quercetin may be able to protect against viruses, this website reported several times. What applies to quercetin, also applies to all kinds of quercetin analogs, such as rutin, quercitrin and isorhamnetin, Brazilian researchers discovered. That's good news for anyone who wants to improve his immune system, but is reluctant to take supplements. Quercetin in its free form is mainly found in supplements. In regular foods such as vegetables, fruit and herbs, you will mainly find quercetin analogs.


Quercetin analogs provide just as much protection against viruses as quercetin itself


Study
Brazilian scientists will soon publish a meta-study in Phytotherapy Research in which they merge and re-analyze the results of previously published animal studies.

In these studies, researchers infected laboratory animals with viruses - usually with human influenza viruses - and subsequently determined whether supplementation with quercetin or its analogues had a positive effect on the course of the infection.

Results
In 3 animal studies, the researchers looked at the effect of quercetin analogues on mortality. The table below provides a brief description of those studies.

The tables and figures below are reduced in size. Click it for a larger version.


Quercetin analogs provide just as much protection against viruses as quercetin itself


Quercetin analogs provide just as much protection against viruses as quercetin itself


Supplementation with quercitrin, quercetin and isorhamnetin reduced risk of death.

In another 3 animal studies, the researchers looked at the amount of viruses in the lungs of the laboratory animals. When the Brazilians aggregated the results of those studies, they found that supplementation with quercetin analogues reduced the viral load.


Quercetin analogs provide just as much protection against viruses as quercetin itself


The above suggests quercetin and its analogs not only protect individuals from viral infections, but may also make people who are already infected with a virus less likely to transmit their infection.

Conclusion
"These findings support the potential of quercetin and its derivatives as a curative agent against viral pneumonia", write the researchers.

"Furthermore, due to their lack of severe side effects and low cost, quercetin may be developed as a safer and cheaper option for the prophylaxis of seasonal or emerging respiratory viral infections, helping to control outbreaks, epidemics, and/or pandemics."

Source:
Phytother Res. 2021 Apr 17:10.1002/ptr.7122. doi: 10.1002/ptr.7122. Epub ahead of print.

More:
Does quercetin take the sting out of covid? 12.08.2021
Covid patients recover faster with quercetin phytosome supplementation 09.08.2021
Quercetin makes zinc a better corona protector 26.07.2021

Archives:
Immune System
Quercetin


Bioavailability of quercetin phytosome is 20 times greater than that of regular quercetin This supplement reduces the risk of coronavirus infection by a factor of 12 Quercetin sabotages influenza virus

Quercetin protects athletes from colds and flu
Quercetin has an antiviral effect in vitro. Quercetin may also reduce the risk of virus infections in real people, especially if they train intensively.

This supplement reduces the risk of coronavirus infection by a factor of 12
A daily doses contains 500 milligrams of quercetin, 500 milligrams of vitamin C and 50 milligrams of bromelain.

Quercetin sabotages influenza virus
Chinese virologists from Southern Medical University report this in Viruses. Is quercetin an antiviral agent?