Originally Posted by kiwi33

This seems to be based on guesswork not evidence.

The way to do this properly for (say) American residents would be to do an epidemiology experiment.

Take a large sample of American residents and measure (not guess) what their dietary gluten levels are. Then see what effects they may have on their risk of Covid-19 infection and the consequences of that infection.

The results of that epidemiology experiment would be based on science rather than guesswork.