Will a miracle diet save you from coronavirus? Experts are doubtful

On the Internet, you can find not only actual advices but also commercial advertising about products that promise miraculous protective effects against the coronavirus. However, we are in a hurry to dispel doubts – there is no type of food, product or dietary supplement that will give us complete immunity to disease.

Coronavirus and diet

Since the spread of the coronavirus (SARS-CoV-2) around the world, there have been many voices on social media saying that certain types of products, vegetables, fruits or dietary supplements can increase resistance to coronavirus infection.

There are even some discussions about miraculous treatment in people who have been confirmed to be infected. The World Health Organization (WHO) is trying to fight such false reports and disinformation, but it’s like fighting the hydra. In place of one disproved fake-news, several new ones sprout.

Although each of us wants to best protect ourselves and our family from the possibility of contracting the coronavirus, so far there is no evidence that any food or diet will protect us from falling ill.

Below you will find a list of products that are most frequently used in such reports and are supposed to have beneficial effects in the fight against coronavirus.

Garlic is good for everything, but … not for the coronavirus

There is some evidence that garlic has an antimicrobial effect, and what’s more, studies conducted so far indicate that active garlic compounds (including allicin, allyl alcohol and diallyl disulfide) protect against some types of bacteria such as salmonella and Staphylococcus Aureus. However, there is a lack of reliable and comprehensive research into the antiviral properties of garlic. Although garlic has been widely considered healthy for many years, its impact on immunity to the coronavirus is highly questionable.

If not garlic, maybe a lemon?

Lemon is one of the most frequently mentioned healthy fruits in the kitchen. Recently, a video has circulated on social media, the author proves that drinking warm water with lemon slices can help fight the coronavirus.

Unfortunately, this amateur video is in no way supported by scientific evidence that lemon – and the substances it contains – can have any effect on the coronavirus and the body’s fight against infection.

Lemon is indeed an excellent source of vitamin C that immune cells need to function. On the other hand, it is not the only source of this vitamin among vegetables or fruits. Therefore, the thesis that this fruit is to be the best source of substances to help fight the coronavirus in the body is incorrect.

Vitamin C is NOT a miracle cure for infections

As mentioned above, vitamin C can improve our immunity to infections and certain diseases, but it certainly cannot be attributed to miraculous or magical properties.

It should also be remembered that not only vitamin C has a positive effect on our immune system. Many of the hypotheses linking vitamin C to the coronavirus are based on analogies to the common cold. Despite the claims of online experts that vitamin C can prevent the common cold and treat more serious illnesses, the evidence supporting such theories is not only uncertain but also mutually exclusive. There are big differences between the common cold and the coronavirus.

There is currently no scientifically proven evidence that supplementation with vitamin C will prevent or treat coronavirus infection.


Generally speaking, there is no evidence that the food we eat can directly affect the pH levels of our blood, cells, or tissues – let alone treat viral infections. The fact is, however, that the body regulates acidity by itself, regardless of the type of food we eat.