In the 1930s researchers misplaced decimal point and exaggerated by tenfold iron content of what extremely healthy vegetable which Greeks mix with feta Italians cook into cannelloni?

In the 1930s, a researcher named Elmer McCollum mistakenly placed a decimal point in his analysis of spinach, resulting in an exaggerated iron content ten times higher than the actual amount. This misconception was widely publicized and became ingrained in popular culture, leading to the belief that spinach is a superfood with incredibly high iron content.

Despite the exaggeration, spinach remains a healthy and nutritious vegetable, rich in vitamins, minerals, and antioxidants. The Greeks enjoy it with feta in salads and other dishes, while the Italians use it as a filling for cannelloni.