Recent research has identified that consuming around 300 grams of fish per week is linked to an increased risk of developing malignant melanoma, a lethal form of skin cancer.
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According to one study, eating two servings of fish per week has been linked to an increased risk of skin cancer.
Researchers have revealed that two weekly servings could put people at risk of contracting malignant melanoma, the deadliest form of skin cancer.
Read also: What’s really in the fish we eat? 58 pharmaceutical contaminants discovered in shrimp, crab and small fish
I study
The study of the Brown University found that people whose typical daily fish intake was 42.8 g (approximately 300 g per week) had a 22% higher risk of malignant melanoma compared to those taking only 3.2 g.
The study also found that those who ate the most fish were 28 percent more likely to develop abnormal cells only in the outer layer of the skin.
The research involved 491,367 adults in the United States aged around 62, who reported how often they ate fried fish, non-fried fish, and tuna, as well as portion sizes.
The researchers then calculated the frequency of melanoma cases that developed over a 15-year period, using data obtained from the cancer registries.
They considered other factors that could influence the results such as weight, smoking and alcohol history, as well as whether there is a family history of cancer.
1% of people developed malignant melanoma while 0.7% developed stage 0 melanoma.
Although no significant link was found between eating fried fish and skin cancer, eating 17.8g of non-fried fish per day was associated with an 18% high risk of malignant melanoma and a 25% higher risk of stage 0 melanoma, compared to eating only 0.3 g.
People who ate 14.2 g of tuna per day instead of 0.3 g also had a 20% higher risk.
Author Eunyoung Cho stated:
We hypothesize that our findings could be attributed to contaminants in fish, such as polychlorinated biphenyls, dioxins, arsenic and mercury.
However, Dr. Michael Jones, senior staff scientist in genetics and epidemiology at theInstitute of Cancer Researchsaid it’s possible that people who eat more un-fried fish or tuna have other lifestyle habits that increase their risk of melanoma.
And he continued:
The authors speculate that the association may be due to contaminants in the fish, but they did not measure the levels of these contaminants in the participants.
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Source: PubMed
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