Even the strictest vegetarian can cook with the Lucky Iron Soup Fish.
Of course, the lucky fish shape isn’t necessary. Any chunk of clean cast iron would do the trick. Even cooking in cast iron pots and pans will add iron to the diet.
I bet Danica can add information, from the dietitian’s point of view. Comment, Danica? I do note that the video clearly says you need other sources of iron in your daily diet, too. The Lucky Iron Soup Fish is a supplement.