Eat Seafood, See Weight Loss, Fish Advocates Say

Recent news reports confirm that obesity rates continued to climb in over 30 states in 2006, so it might be surprising to learn that there are some foods Americans need to eat more of. Currently only 20 percent of the general population and 18 percent of pregnant moms are eating two weekly servings of seafood as recommended by experts, including the American Heart Association (AHA) and American Dietetic Association (ADA). More people might dive in to seafood if they knew that in addition to being low in fat and high in protein, fish contains other components that may boost weight loss.

A study published recently in the International Journal of Obesity finds that in young adult men, a low-calorie diet that includes fish results in slightly more weight loss than a similar low-calorie diet without fish. The study is part of SEAFOODplus, a large multicenter project sponsored by the European Union to explore the benefits of seafood. Researchers think seafood can enhance weight loss because of the omega-3 fatty acids, which may decrease growth of fat cells, and special fish proteins, which may reduce body fat mass.

"Seafood is a smart choice not only for a fit lifestyle, but a busy schedule. Many people don't know that seafood is quick and easy to prepare and that it is also inexpensive. There are many new products on the market like flavored canned and pouched tuna, flash frozen shrimp that cooks up in minutes and pre-marinated fresh tilapia fillets that come ready to throw on
the grill," says Jennifer Wilmes, nutritionist with The National Fisheries Institute. The institute is an advocate for the fish industry.

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Eat Fish -- Especially If You Drink High Levels of Alcohol

Essential fatty acids (EFAs) are just that; an "essential" part of the total fat intake necessary for a healthy human diet. Most EFAs come from plants, but some are animal-sourced. A new study has found that men who binge drink have substandard intake of n-3 fats, one of two types of EFAs, indicating poor dietary choices with negative long-term health consequences.

Results are published in the August issue of Alcoholism: Clinical & Experimental Research.

"Essential fatty acids are important building blocks of living cells, making up a substantial part of cell walls," explains Norman Salem, Jr., chief of the Laboratory of Membrane Biochemistry & Biophysics at the National Institute on Alcohol Abuse and Alcoholism "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." Salem is also the study's corresponding author.

The most important EFAs are polyunsaturated fatty acids (PUFA), said 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," says Brenna.

This imbalance, adds Salem, has become pronounced only 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," says 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."




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