Regarding the saying of friends who love sashimi, they think that the parasites in sashimi are not terrible, and they can be solved by dipping some wasabi before eating, which is really not comprehensive enough.
First of all, mustard does have a certain bactericidal effect, which can kill some bacteria and parasites. However, it is not easy to rely on wasabi to completely eliminate bacteria and parasites in sashimi. The bactericidal effect of mustard is mainly derived from the chemical isothiocyanate, but only a light dip in mustard often has insufficient action time to meet the requirements of completely killing bacteria and parasites.
In addition, there is one more thing to pay attention to in order to eliminate parasites by dipping them in mustard. Parasites hide deep in the fillet, and if they are not found and soaked in the mustard, some of the parasites will not be able to reach the mustard and therefore cannot be destroyed.
To sum up, dipping wasabi is not effective in destroying bacteria and parasites in sashimi. While it may make you feel a little better when you eat it, it doesn't really solve the problem. When handling sashimi, we still need to pay attention to hygiene and safety, choose fresh, safe fillets, and ensure thorough heating during cooking to avoid the risk of parasites and bacteria.