Quercetin, a natural compound, could help in fighting against Covid-19

Quercetin, a natural compound, could help in fighting against Covid-19

The Italian and Spanish doctors conducted a study that discovered the natural compound quercetin could be very helpful against the new coronavirus, Sars-CoV-2. The researchers discovered that quercetin inhibits the new coronavirus, with a destabilizing action on 3CLpro, one of the proteins by which the pathogen develops.

The study was made by a group of Italian and Spanish scientists  and the conclusions were presented in the Italian magazine “Il Messagero”

The research is a more complex project, initiated by the Spanish Foundation HNA, Nanotechnology Institute of National Counsel of Research, CNR-Nanotec from Cosenza.


Computer simulations showed quercetin blocks the activity of 3CLpro, stopping the development of Sars-CoV-2

The scientists are very hopeful and enthusiastic about this discovery as quercetin seem to act like many anti-virals which are currently under ongoing studies.

More about the mentioned study you can find here.

Quercetin is a powerful antioxidant that reduces some allergic reactions, supports the health of vascular system, protects us against free radicals and lowers inflammation

Quercetin is recognized for its anti-allergic properties, reduces allergic symptoms like sneeze, shortness of breath, runny nose, red eyes, stuffy nose etc. Quercetin has certain positive effects on the high cholesterol level and could help our body in adapting to stress.

After the conclusion of the above mentioned study, quercetin could be used in making a synthesis molecule, a molecule even more powerful, that doctors will use against the new Covid-19.

Natural sources of Quercetin

This study does not give details about the necessary quercetin quantity or its type (food source or supplement), but the research of this type is still at an early stage. Even if the consult and treatment recommended by doctors are the most important, we can still add natural sources of quercetin in our daily diet.

Quercetin can be found in vegetables, fruits, cereals, nuts and seeds. It seems people who keep a “plant-based diet” eat a higher amount of quercetin.

Therefore, the food high in quercetin are: capers, apples, onions, bell peppers, asparagus, broccoli, grapes, beans, tomatoes, tea and black tea, wine etc.

Among these, capers are the highest in quercetin level: 100 mg of raw capers contain 234 mg quercetin and canned capers – 173 mg quercetin.

Some other studies showed that organic vegetables could have a higher amount of quercetin: organic tomatoes have a 79% more quercetin amount than those conventionally grown. Besides, these differences could apply also depending on the tomatoes varieties.

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Quercetin natural supplements – vitamin C and certain enzymes could increase the absorption of this substance

Besides the natural sources of quercetin, there is also the variant of quercetin natural supplementing. The recommended doses vary from 500 to 1000 mg a day, but before taking this type of supplements, you must consult a doctor.

As food and under the recommended doses, quercetin should be safe, but some side effects could appear at higher doses (more than 1000 mg) and for those with certain food allergies/intolerances

If you do not tolerate certain food that are high in quercetin, you might not tolerate either these supplements. Moreover, studies showed that more than 1000 mg quercetin a day could give stomach pains or headache.

Qercetin - part of some endometriosis sudies 

Those who follow this website know I also write here an endometriosis journal as I am dealing with this disease for more than 10 years. During my research I have found several studies that say quercetin is also beneficial for endometriosis too. Here you can read the mentioned study. Until I had Covid I haven't tried Quercetin and now I am taking a lot of other supplements for endometriosis. Therefore, even if I am very ok with endometriosis I cannot say for sure this is only due to quercetin. 

Yet, I do believe you can try it, not necessarily on supplement form, but as natural sources too. 

Quercetin - my experience with it 

Later edit: I first wrote this article in the second part of 2020. It was just a study that, I must admit, I didn't credit too much. Though, in April 2021, I and my whole family had Covid: an unusual, yet mild form, except my mother. Since then we all take 500 mg Quercetin a day. The recovery speed was great, we didn't experience tiredness as other friends that also had Covid and we feel more energized even now, after so many months. Not to say we haven't had a cold since then but it is true we also take some other supplements such as vitamin C and also decided to take the vaccine. Yet, we also decided to mix it with the natural way, a good diet and some top supplements. 


Therefore, if you want to prevent (a more serious form), to stay healthy and energized, to recover after illnesses, besides what scientists say, I woupd also recommend Quercetin. 

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