Emmanuel Goldstein said:

" A healthcare worker in an Asian country noted that chronic iron deficiency was impairing the health of the population. They were too poor to buy iron cooking pots, but could get the same effect by putting a hunk of iron into their Aluminum soup pots. He tried distributing iron chunks with instructions, but mostly they were sold or used as door stops.

Then, he got someone to make the iron chunks in the shape of "lucky fish," based on a local folk story. The same people who were skeptical about improving their health with a chunk of iron in the soup pot, gladly believed that the iron "lucky fish" would make their soup more healthy, and used the fish."