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≥ 95% m mecury is absorbed into the GI tract via oral ingestion
≤ 10% remain in the body after digestion
since brian ate sashimi a max of once a day, and assuming 1 poop a day: ∑ {.1(.95+Xn)) =~ .106 mercury remains in blood stream per day
normal levels in human body = 10 ng/mL, ended with 30. so change of 20 ng/mL = 0.02 mg/L or pp,. 5 L in human body, so ∆=1 mg
"Six pieces of tuna from most of the restaurants and stores would contain more than 49 micrograms of mercury" = 0.00816666667 mg per piece
.106 * 0.00816666667 mg/piece * (number of pieces) = 1mg
n = 1155.17905
about 1 oz for a piece of sashimi; 4800 oz for the average size of a yellowfin tuna raised in a fishery
brian must have eaten about 1,155 pieces of tuna sashimi – or almost a quarter of a whole ass 300 lbs yellowfin tuna.
this looks like about 48 pieces of tuna sashimi per week for six months
sources
size of tuna: https://www.fisheries.noaa.gov/species/pacific-yellowfin-tuna
mercury levels in tuna: https://royalsocietypublishing.org/doi/full/10.1098/rsbl.2010.0156
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