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Scientists Discover New Benefits of Eating Fatty Fish

June 25, 2023
in Science
Scientists Discover New Benefits of Eating Fatty Fish
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A new study from the University of Eastern Finland has found that consumption of fatty fish lowers the lipophilic index, indicative of improved cell membrane fluidity, in individuals with impaired glucose metabolism or coronary heart disease. This lower lipophilic index, linked to larger HDL particles and reduced cardiovascular risk, was not seen in participants consuming lean fish or camelina sativa oil.

A recent study conducted by the University of Eastern Finland has discovered that consuming fatty fish can lower the lipophilic index in individuals with impaired glucose metabolism or coronary heart disease.

The lipophilic index is an indicator of the fluidity of cell membranes. The lower the lipophilic index, the better the membrane fluidity. This latest study, published in Nutrition, Metabolism & Cardiovascular Diseases, also linked a reduced lipophilic index with an increased mean size of HDL particles and a higher concentration of larger HDL particles, which suggests cardiovascular benefit.

The lipophilic index has been introduced to describe membrane fluidity, which can modify the function of cells and membrane-bound proteins. The length and saturation of fatty acids in membranes affect membrane fluidity. For example, fatty acids in serum lipids or erythrocyte membranes can be used to calculate the lipophilic index.

Previous studies have suggested that long-chain omega-3 fatty acids in fish have a beneficial effect on cardiovascular risk, however, more research into the mechanisms is still needed. Camelina oil, on the other hand, is rich in alpha-linolenic acid, which is an essential omega-3 fatty acid whose associations with membrane fluidity are not known.

The researchers used data from two randomized clinical trials to study the effects of fish and camelina sativa oil intake on the lipophilic index. The first study included 79 men and women with impaired glucose tolerance. The second study included 33 men and women with cardiovascular disease.

Study participants were randomly divided into four groups for a 12-week intervention: the camelina oil group, the fatty fish group, the lean fish group, and the control group in the first study. In the second study, subjects were randomly divided into fatty fish, lean fish, and control groups for an 8-week intervention. The lipophilic index was calculated based on erythrocyte membrane fatty acids in the first study, and serum phospholipid fatty acids in the second study.

In both studies, eating four meals of fatty fish per week reduced the lipophilic index, which indicates better membrane fluidity. Better membrane fluidity has been associated with lower cardiovascular risk. Better membrane fluidity as measured by the lipophilic index was also associated with larger HDL particles, which have also been associated with a lower cardiovascular risk. Eating lean fish or camelina sativa oil did not affect the lipophilic index.

Reference: “Fatty fish consumption reduces lipophilic index in erythrocyte membranes and serum phospholipids” by Arja T. Lyytinen, Monira Yesmean, Suvi Manninen, Maria Lankinen, Monika Bhalke, Linda Fredrikson, Reijo T. Käkelä, Katariina Öörni and Ursula S. Schwab, 17 April 2023, Nutrition, Metabolism and Cardiovascular Diseases.
DOI: 10.1016/j.numecd.2023.04.011

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : SciTechDaily – https://scitechdaily.com/scientists-discover-new-benefits-of-eating-fatty-fish/

Tags: discoverscienceScientists
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