Mercury Levels In Fish. Do All Fish Contain Mercury?

By Adriane Marie •  Updated: 08/18/22 •  3 min read
is fish good for you? healthy? nutritious?

Mercury levels in fish. Do all fish contain mercury? What are side effects every ethical consumer must know?

Here’s how buying fish high in mercury will impact your health.

Food is something we consume every day and if you’re like me, you do all the research you can to make sure you don’t hurt yourself, the planet, animals or others when shopping.

As an ethical consumer myself, I am giving you all the info I’ve found on mercury in fish.

You are going to learn all about mercury in fish. This will include how fish get mercury, potential health risks, pregnancy and much more. 

After learning about mercury fish levels you will be prepared to make the best choices you can the next time you buy food.

This post is all about fish and mercury that every ethical consumer should know.

mercury levels in seafood and fish have dangerous side effects
Mercury Levels In Fish | Do All Fish Contain Mercury?

What is mercury?

Mercury is metal that produces toxic effects to the body. If consumed in high quantities it poisons the kidneys and nervous system.

Mercury occurs naturally at low levels in rock, water and soil. However, human activity (most notably the burning of fossil fuels) has dangerously increased mercury levels to be around 450% higher than natural. 

How do fish get mercury?

Air pollutants from coal burning factories, for example, can travel around the world into lakes, rivers, and oceans.

It is then absorbed and ingested by small aquatic organisms and starts working its way up the food chain.

Think fish is a good meat alternative? Think again! There are other problems with fish…

Other problems with fish

You are concerned about not eating fish and seafood because of mercury levels but fish is even more problematic! Here’s how…

Fish with mercury pregnancy

The only way to ensure you do not consume mercury is to eliminate seafood from your diet entirely. Fish and crustaceans can be replaced by foods that are high in omega-3 fatty acids and vitamins such as D and B2 (riboflavin). 

If you eat fish and shellfish low in mercury during your pregnancy it is critical you do not eat any more than 8 to 12 ounces per week!

Mercury fish levels. Do all fish contain mercury?

All fish and shellfish contain at least some traces of mercury. Nearly all mercury that we acquire within our bodies comes from eating seafood.

Too much mercury can cause the following symptoms:

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02/17/2024 07:08 pm GMT

Fish high in mercury

Large, predatory fish on top of the food chain the highest levels of mercury, namely:

Fish with low mercury

This post was all about mercury fish levels.


What to do about mercury in fish – Harvard Health

Mercury in fish – Better Health Channel

Adriane Marie

Hi, I'm Adriane, creator of HEALabel! I organize info for you to comprehensively see how purchases impact health, environment, animals and laborers. Stay aware because you care! Subscribe below to get my weekly newsletter with tips, new info and other ethical consumer insight.

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