Page last updated: Tuesday, November 18, 2008
Eating fish especially important for heavy drinkers
A recent study found that male heavy drinkers tend to decrease their intake of essential fatty acids as they increase their alcohol consumption, compounding their health risks.

Researcher Norman Salem Jr. of the National Institute on Alcohol Abuse and Alcoholism and colleagues found that heavy drinking was associated with declining intake of total saturated fatty acids, total monounsaturated fatty acids (MUFA), and total polyunsaturated acids (PUFA).

Essential fatty acids (EFA’s) are important building blocks of living cells, making up a substantial part of cell walls EFAs also have many biological functions, and a lack of them leads to loss of growth and development, infertility, and a host of physiological and biochemical abnormalities.The most important EFAs are polyunsaturated fatty acids (PUFA), according to J. Thomas Brenna, professor of human nutrition and of chemistry & chemical biology at Cornell University. Particularly two types, Brenna noted: the omega-6 PUFA linoleic acid (LA), also called n-6 fats, and the omega-3 PUFA linolenic acid (ALA), also called n-3 fats. ‘Most Americans consume adequate amounts of LA in their diets through the use of vegetable oils, but tend to have low intakes of ALA,’ said Brenna.

This imbalance, according to the study has become pronounced in the last century and many believe it is a source of the increase of many common diseases in Western society. Salem and his co-authors wanted to investigate what influence alcohol consumption might have on EFA imbalance in the Western diet.

Researchers used data from 4,168 adults who self-reported their alcohol consumption as part of the 2001-2002 National Health and Nutrition Examination Survey. Participants were also interviewed about their EFA intake during a single previous 24-hour period. Results indicate that EFA intake drops as alcohol consumption increases, particularly among men.

“Our most important finding is the decrease in n-3 EFA intake in binge-drinking men,” said Salem. “We really couldn’t evaluate women who binge drink two or more times per week due to the low numbers in this population, although it is quite possible that we would obtain similar findings. The changes we found indicate that those who drink alcohol make food selections in such a way as to decrease foods with this important nutrient. The binge-drinking men have decreases in the longer chain n-3 fatty acids, the ones that we typically get from eating fish, and so this suggests that they eat less fish.”

“Previous studies by Dr. Salem and colleagues have shown that requirements for these nutrients actually increase with greater alcohol consumption,” noted Brenna. “However, dietary influence does not explain all of the changes observed in past studies of fatty-acid changes in organs. Alcohol also has an effect on fatty acid metabolism, mainly through increasing fat break down.”

The brains of men consuming high levels of alcohol, particularly those who regularly binge drink, are further compromised by a low intake of EFA.”

“In summary,” said Salem, “for those who drink, especially heavy drinkers or those who drink more than one drink per day on average: make sure that you obtain your sources of n-3 fatty acids in the diet, that is, eat more fish.”

Source: Kim, SY, Breslow, RA, Ahn, J, Salem, N. (2007) Alcohol consumption and fatty acid intakes in the 2001-2002 National Health and Nutrition Examination Survey. Alcoholism: Clinical and Experimental Research, 31(8): 1407-1414; doi: 10.1111/j.1530-0277.2007.00442.x.

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