However, too many fish can be bad. According to a new study, eating two servings a week – as recommended by the NHS – is associated with an increased risk. Skin tumorThe most deadly in turn.
In a new study, experts at Brown University found that people whose daily intake was 42.8 g (which is about 300 g per week) had a 22 percent higher risk of malignant melanoma than those whose daily intake of fish was only 3.2 g. .
Those who ate more fish also had a 28 percent increased risk of developing abnormal cells in the outer layer of the skin alone – known as stage 0 melanoma or in situ melanoma (also sometimes referred to as precancerous cancer).
The findings were based on 491,367 American adult studies and published in the journal Causes and control of cancer.
Author Eunyong Chom said the study “revealed an association that needs further investigation.
“We suggest that our findings may be due to fish contaminants such as polychlorinated biphenyls, dioxins, arsenic and mercury.
Other experts said that fish is an important healthy food and there was no need to stop eating it.
Dr. Duan Mellor, a senior lecturer at Aston Medical School, said: “The authors suggest that there may be a link between fish contaminants, which may increase the risk of developing cancer, but this is likely to affect not only the risk of skin cancer.
“This study does not have a clear mechanism for how eating fish can increase the risk of developing melanoma – there is no clear evidence that eating fish can increase the risk of developing skin cancer.”
“It is important to remember that eating two servings of fish a week … can include important nutrients such as omega-3 fatty acids in a healthy diet, and this study should not prevent people from including fish. A healthy diet. “
The study participants were on average 62 years old and reported how often they ate fried fish, not fried fish and tuna in the previous year, as well as the size of their portions.
The researchers then calculated the incidence of new cases of melanoma that developed over 15 years using data from cancer registries.
They took into account factors that can affect outcomes such as people’s weight, smoking or drinking, diet, family history of cancer, and average levels of ultraviolet radiation in their area (including exposure to the sun – a known risk factor for skin cancer).
In total, 5,034 people (1 percent) developed malignant melanoma during the study period and 3,284 (0.7 percent) developed stage 0 melanoma. Disintegration of the results showed that whole fish intake was associated with higher risks.
Meanwhile, people whose typical daily intake of tuna was 14.2 g had a 20 percent higher risk of malignant melanoma compared to those who normally take 0.3 g.
Eating 17.8 grams of non-fried fish per day is associated with an 18 percent higher risk of malignant melanoma and 25 percent higher risk of stage 0 melanoma compared to eating only 0.3 grams.
However, no significant association was found between fried fish and skin cancer.
Also, the average daily intake of fish was calculated at the beginning of the study and may not represent how much people eat in their lifetime.
Dr Michael Jones, a senior fellow in genetics and epidemiology at the Cancer Research Institute in London, said: “The authors found that higher intake of uncooked fish and tuna was associated with melanoma. These results were statistically significant and therefore unlikely due to randomness.
“People who eat more non-fried fish or tuna may have other lifestyle habits that increase the risk of melanoma. The authors reviewed this and altered some of the potentially confusing factors.
However, as the authors acknowledge, this is an observational study (not a randomized study) and there may be (known and unknown) factors that the authors have not corrected or altered sufficiently.
The authors suggest that the association may be due to fish contaminants, but they did not measure the levels of these contaminants in the participants.
“A generally healthy balanced diet should include fish, and the results of this study do not change that recommendation.”
Research indicates a link between skin cancer and overeating fish
Source link Research indicates a link between skin cancer and overeating fish