For years, many people believed spinach had exceptionally high amounts of iron. The myth was born from a decimal point error made by a German chemist in 1870 when he wrote down the spinach iron content. This mistake turned 3.5 grams of iron into 35 grams, which is way higher than it is. Iron is a vital mineral required to produce hemoglobin, which helps red blood cells carry oxygen throughout the body. It is also needed for several other functions
