Greater fish consumption related to elevated danger of malignant melanoma in US, examine suggests

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A brand new examine warns consuming increased quantities of tuna and non-fried fish seems to be related to a larger probability of malignant melanoma and state 0 melanoma, in line with a current report printed within the journal Most cancers Causes and Management.

“This study is important because it’s very large and it’s prospective by design, meaning that fish intake was assessed before the development of cancer,” stated writer Eunyoung Cho, an affiliate professor of dermatology and epidemiology at Brown College. 

“Although fish intake has increased in the U.S. and Europe in recent decades, the results of previous studies investigating associations between fish intake and melanoma risk have been inconsistent — our findings have identified an association that requires further investigation.”

The Brown College researchers discovered a median each day fish consumption of 42.8 grams (1.5 ounces) in comparison with a median each day fish consumption of three.2 grams (.11 ounces) had a 22% increased danger of malignant melanoma and a 28% elevated danger of creating stage 0 most cancers, in any other case referred to as melanoma in situ, the place irregular cells are solely within the outer layer of the pores and skin, the examine’s launch famous.

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The American Most cancers Society says melanoma is the fifth most typical most cancers within the U.S., with a lifetime danger of two.6% for White individuals, 0.1% for Black individuals and 0.6% for Hispanic individuals.  

Fresh tuna sandwich with lettuce and tomato

Contemporary tuna sandwich with lettuce and tomato
(iStock)

“A serving size of cooked fish is approximately 140-170 grams (5-6 ounces); a can of tuna is 142 grams (5 ounces),” the discharge stated.

The examine recruited 491,367 adults from throughout the U.S. to the Nationwide Most cancers Institute’s NIH-AARP Weight-reduction plan and Well being Research between 1995 and 1996, with a mean age of 62 among the many individuals.

The examine analyzed the portion dimension and the way continuously the individuals ate three kinds of fish: 1) fried fish, 2) non-fried fish and three) tuna throughout the earlier 12 months.

Utilizing most cancers registries, the researchers tracked the incidence of latest melanomas over a median interval of 15 years, whereas accounting for different components that would affect the end result, corresponding to sociodemographic components, smoking historical past, household historical past of most cancers, each day consumption of alcohol, each day consumption of caffeine and energy, and the common ultraviolet radiation ranges in every participant’s native space, per the discharge. 

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5,034 individuals (1%) developed malignant melanoma whereas 3,284 (0.7%) developed stage 0 melanoma, per the discharge. 

Though the examine didn’t present important associations between consuming fried fish and the danger of malignant melanoma or stage 0 melanoma, the researchers discovered increased consumption of non-fried fish and tuna was related to an elevated danger of malignant melanoma and stage 0 melanoma.

Grilled Salmon Skewers from Fulton Fish Market

Grilled Salmon Skewers from Fulton Fish Market
(Fulton Fish Market)

However the authors be aware the examine has some limitations, together with the analyses didn’t account for sure danger components for melanoma, together with mole rely, hair coloration or historical past of sun-related behaviors.

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One other limitation was the examine could not have had an entire illustration of the individuals’ lifetime weight loss program as a result of their common each day fish consumption was calculated solely initially of the examine.

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And since it’s an observational examine, it couldn’t conclude a causal hyperlink between fish consumption and melanoma danger.

“We speculate that our findings could possibly be attributed to contaminants in fish, such as polychlorinated biphenyls, dioxins, arsenic and mercury,” Cho stated. 

Tiffany Keene says her son Cruz, 9, is a seafood lover, which is why she incorporated a shrimp and lobster wrap into his golden birthday lunch box.

Tiffany Keene says her son Cruz, 9, is a seafood lover, which is why she included a shrimp and lobster wrap into his golden birthday lunch field.
(Tiffany Keene)

“Previous research has found that higher fish intake is associated with higher levels of these contaminants within the body and has identified associations between these contaminants and a higher risk of skin cancer. However, we note that our study did not investigate the concentrations of these contaminants in participants’ bodies and so further research is needed to confirm this relationship.”

The researchers don’t advocate any adjustments to fish consumption, however recommend extra analysis is required to find out if sure parts of fish, significantly the contaminants like mercury, are contributing to the affiliation between fish consumption and melanoma danger.

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