By Dr. Jonathan Seah | Prestige
What causes severe Covid-19 disease and death
As we have now seen over the past 2 years, about 80 percent of people who get COVID-19 have no symptoms or only mild symptoms, 14 percent get severe symptoms like pneumonia, and 5 percent get critical symptoms like respiratory distress or multi-organ failure, and about 2 percent die[3]. The mechanism for these bad outcomes is still being investigated, but much of the research points to abnormal immune responses (culminating in what has come to be called a “cytokine storm”) and the presence of chronic inflammation. We believe this is probably why the outcomes are often worse for older people[4], (who typically have aged immune systems), and for those with some pre-existing illnesses that cause systemic inflammation (like diabetes, high blood pressure, and cardiovascular disease)[5].
So, the question then becomes – what are some simple things we do ourselves to reduce the chronic inflammation in our bodies, and to rejuvenate our immune systems?
The best Covid-19 diets: Plant-based and clean keto
An unhealthy diet could increase your risk factors for a severe COVID-19 infection[6]. Over the past year, there have been a few very large research studies that have demonstrated quite clearly that what you eat can affect how your body reacts to COVID-19.
One of the most important was a study conducted amongst almost 3,000 front-line health care workers (doctors and nurses) across 6 countries, which showed that those who followed a largely plant-based diet (mostly vegetables and plant proteins, and less red and processed meats and sweetened beverages and alcohol), had a 73 percent lower likelihood of developing moderate-to-severe COVID-19 infections[7]! This is possibly because a plant-based diet often has more micronutrients that are essential for the proper functioning of the body’s immune system, such as polyphenols, carotenoids, dietary fibre, vitamins A, C, E, and folate, and minerals like iron, potassium, and magnesium. Or because the virus itself is weakened in a nutrient-dense environment[8]! Also, in this same study, those who ate a plant-based diet together with fish had a 59 percent lower chance of moderate-to-severe COVID-19 infection. In this case, it is thought that the mechanism of action might be a reduction of chronic systemic inflammation. Fish is an important source of vitamin D and omega-3 fatty acids, which have anti-inflammatory effects on the body.
An even larger study, this time of almost 600,000 people, also showed that those who ate diets characterized by more healthy plant-based foods correlated with a 41 percent lower chance of severe COVID-19 infections[9].
