Q4: When you ingested fish today, how much of the methylmercury in it will
remain in the body after one year?
A4: It is estimated that about 3% will remain after one year.
It is said that the time required to excrete half of a methylmercury body
burden (the biological half-life) is about 70 days in human beings.
In other words, the amount of methylmercury remaining in the body should
decrease by one half every 70 days.
Therefore, it can be calculated to decrease to 25% after 140 days, 12.5%
after 210 days, ... and 3.125% after 350 days (about one year).