(ORDO NEWS) — Scientists have conducted two fairly large clinical studies to determine whether vitamin D helps avoid infection with the coronavirus.
The results showed that the respiratory tract remains vulnerable to COVID-19 with increasing consumption of the substance.
The first study was conducted in the UK from the end of 2020 to June 2021. 6,200 adult patients over the age of 16 took part in it. At the time when they were registered, none of them took additional vitamin D.
Then half of the patients passed a blood test for the presence of vitamin D. People who were found to be deficient began to take 3200 or 800 IU/day.
They used the vitamin for six months. At the same time, the other half of the participants did not receive any supplements.
During the six months that the study was conducted, it was possible to find absolutely no effect of vitamin D on the cases of coronavirus or acute respiratory tract infections that were registered during this time.
Approximately the same number of adverse events was recorded in two different groups. At the same time, none of them was associated with additional intake of vitamin D.
The second test was already conducted in Norway from November 2020 to June 2021. Cod liver oil was used in the study.
It contains a small amount of vitamin D and a lot of omega-3 fatty acids. 34,741 people aged between 18 and 75 took part in the second test.
They did not use any vitamin D supplements. Instead, some of the participants drank 5 ml of fish oil daily and the rest 5 ml of a placebo (the researchers used corn oil) for six months.
At the very beginning of the study, the patients were examined and 86% of them did not need vitamin D.
This time, the scientists also failed to detect the effect of fish oil on cases of coronavirus infection, when compared with a placebo.
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