Fruits, vegetables and coffee can help protect against Covid-19

Certain foods and beverages may extend the duration of protection from the Covid-19 vaccine and reduce the risk of developing the coronavirus.

Currently, scientists estimate that the vaccine lasts about 6 months after the second dose. But a study published in the journal Nutrients suggests that certain foods and beverages may extend this immunity.


First, vegetables: eating a lot of them would reduce the risk of testing positive for coronavirus by 12%. Then, drinking two cups of coffee per day would have almost the same virtues, up to 10%. The researchers also observed this risk reduction with tea, oily fish and fruits. “A person’s nutrition has an impact on immunity and the immune system plays a key role in an individual’s susceptibility and response to infectious diseases, including Covid-19,” explains Marilyn Cornelis, an author of the study.

Antioxidants protect the body’s cells

“There is caffeine, but coffee is also composed of dozens of other compounds that could potentially explain the protective associations observed,” continues Marilyn Cornelis. Both coffee and tea contain antioxidants, which are micronutrients that help protect the body’s cells. They are also present in many fruits and vegetables such as nectarines, cucumbers, tomatoes, etc. This is one of the reasons why doctors and nutritionists recommend a varied and balanced diet to their patients.


On the other hand, fruits and vegetables contain dietary fibers that are essential for our health: they promote the growth of good intestinal bacteria, help with weight management, contribute to good digestion, limit bad blood cholesterol, etc. According to the Vidal website, a French medical book for health professionals, the recommended daily intake for a good intestinal transit is between 30 and 45 g of fiber. A good way to achieve this is to eat at least five fruits and vegetables a day.

A study conducted with 38,000 participants

To reach their conclusions, the researchers studied data from nearly 38,000 people between the ages of 40 and 70 from the Biobank study conducted between 2006 and 2010. These same participants underwent coronavirus testing between March and November 2020. 17% of them tested positive for Covid-19.

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