Recently I found out 2 important factors as follows.
1. Not a few people in Italy, including Calabria region, have been suffered from IDDs (iodine deficiency disorders).
2. The number of dead in countries which have a food culture of eating seaweeds is very few.
(dead / population ratio as of March 31, 2020)
Italy : 0.026 %
France : 0.013 %
Ireland : 0.003 %
Denmark : 0.003 % (*)
Norway : 0.001 % (*)
Korea : 0.0004 %
Japan : 0.00001 %
Ireland people have eaten "Chondrus Crispus" (red algae) for long time. So the name of the seaweed is also called as "Irish Moss".
Korea imported Japanese edible seaweed culture partially.
(*) Concerning these 2 countries, exact information about food culture is not available to me. But it is the fact that the Vikings were eating Fucus (brown algae) in order to prevent scurvy in ancient times. Just one more information, I would like to refer to the case of Brittany region in France most …