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.
Here is a list of the U.S. bills and the common time frames for circulation before destruction. 1  $1.00 bill â 22 months. 2  $5.00 bill â 2 years. 3  $10.00 bill â 3 years.  $20.00 bill â 4 1  years. $50.00 bill â 9 years.  $100.00 bill â 9 years.