Why Is Tuna So High In Mercury: Unveiling The Hidden Danger
Is Canned Tuna Safe To Eat? Experts Weigh In On The Benefits Of Eating The Canned Fish | Time
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Can You Get Too Much Mercury From Eating Tuna?
Can consuming tuna lead to excessive mercury intake?
It’s crucial to be aware that specific varieties of tuna contain elevated levels of mercury, a heavy metal that can pose health risks when consumed in excessive amounts, especially for certain demographic groups. Mercury contamination in fish, including tuna, is a concern due to its potential adverse effects on human health. As of February 15, 2023, it’s important to understand the potential risks associated with mercury exposure through tuna consumption, as these risks can vary depending on the type of tuna and individual factors.
Why Does Tuna Have Mercury But Not Salmon?
The discrepancy in mercury levels between tuna and salmon can be attributed to the bioaccumulation of mercury in aquatic ecosystems. This process occurs when larger fish prey on smaller fish that may carry varying levels of mercury contamination. As these larger fish continue to consume their smaller counterparts, the mercury accumulates in their flesh over time. Consequently, larger fish such as tuna tend to have higher mercury concentrations compared to smaller fish like salmon. This phenomenon is a result of the dietary habits and lifecycles of these fish species within the complex marine food web. (Source: 14.2 November 2020)
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In tuna flesh, mercury essentially occurs as methylmercury, which is the organic form of mercury that builds up naturally as tuna grow older and bigger; this process is known as bioaccumulation. Methylmercury is eliminated by marine organisms at a slower rate than it is accumulated (see Box 1).Takeaway. Certain types of tuna are high in mercury, which can have harmful effects on health in high amounts or in certain populations.When larger fish eat smaller fish that are contaminated with varying amounts of mercury, the element accumulates in their flesh. Generally, this means that larger fish like tuna contain more mercury than smaller fish like salmon (14).
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