Surprising Facts About the Vikings and How They Really Lived

Vikings used onion soup to keep track of their injuries

Warriors who came back from war with wounds and injuries were made to eat a very strong onion soup that had a lot of spices. The onion soup was made to be very potent so that the smell would emit from the wounds.

Source: Herald Weekly

It is believed that if they were able to smell the onion soup from their wounds, it was an indication that their wounds were very deep. Remember that there was no medicine yet during the Viking Age. Using the onion soup trick sounds like a cool alternative.