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.
1 A $1 bill lasts 18 months; $5 bill, two years; $10 bill, three years; $20 bill, four years; and $50 and $100 bills, nine years. 2  Bills that get worn out from everyday use are taken out of circulation and replaced. 3  How much does $1 million weigh? 4  That would depend on the denomination of the bills you use.