1 Research shows youâre around 400% more likely to have too much iron than not enough â and this can pose serious risks to your health. 2  In one study of more than 1,000 people, only 3 percent were iron deficient, but 13 percent had iron overload.
According the Bureau of Printing & Engraving, the average lifespan of a $100 bill is about 22 years.ccording the Bureau of Printing & Engraving, the average lifespan of a $100 bill is about 22 years.
However given that the average US $1 bill  stays in circulation for 2.5 to 3.5 years and tâ¦hat the bills are  heavily used, they probably change hands at least once a day. That  would equate to about 900 to 1100 people using each one during its  existence.