HomeAnswersToxicologypoisoningWhat is the possibility of mercury poisoning by eating skipjack tuna daily?

Does eating two cans of skipjack tuna daily for seven days cause mercury poisoning?

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The following is an actual conversation between an iCliniq user and a doctor that has been reviewed and published as a Premium Q&A.

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iCliniq medical review team

Published At November 12, 2021
Reviewed AtFebruary 21, 2024

Patient's Query

Hello doctor,

I have been eating two cans of skipjack tuna every day for the past seven days. I just now read that tuna contains more methylmercury. So, I stopped eating it immediately. How much mercury could have been built up in my body? Will this lead to mercury poisoning? Kindly help.

Answered by Dr. Arul Amuthan L

Hi,

Welcome to icliniq.com. The industrial wastes are finally accumulated in the sea; hence, marine meats (fish) contain mercury. The mercury level in fish depends on the mercurial content in the ocean where the fish was living. Therefore the mercury level in the fish will vary from country to country. So, please check where did the fish was caught and packed. Mostly, these things are taken care of by the manufacturer. They test the mercury levels in fish before packing. Second thing, among all the fishes, skipjack tuna has the least mercury accumulation. So, my opinion is that within seven days, you would not have got the toxic level of mercury. It happens only if you consume mercury contained fish daily for years together. So, do not worry about it. In the human body, there are excellent detoxifying mechanisms. If the liver is healthy, mercury from the body can be eliminated easily. Thank you.

Patient's Query

Hello doctor,

It was not a skipjack tuna. What I ate was a big-eye tuna caught in the Indian Ocean. Could high levels of mercury can have an effect on the pigments in the iris resulting in hyperpigmentation (darker iris)? Thanks.

Answered by Dr. Arul Amuthan L

Hello,

Welcome back to icliniq.com. The fish is good and healthy. The mercury can get deposited in the iris and change its color. But it is rare. Before it reaches this level, other organs like skin, kidneys, liver, and brain get damaged. People with this damage usually have some clinical symptoms much earlier and visit a doctor. The doctor will do a blood test to find the mercury level. So, a simple blood test on mercury levels can give the idea of mercury overload. Your iris color change may be for many other reasons. A blood test is the better way to conclude. Thank you.

Same symptoms don't mean you have the same problem. Consult a doctor now!

Dr. Arul Amuthan L
Dr. Arul Amuthan L

Pharmacology

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