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Lee Swanson Research Update

Flax Fiber Appears to Cut Hunger Feelings for Young Men

September 2011

Dietary fiber from flaxseed may suppress rises in blood levels of lipids after a meal and modulate appetite, according to a new study from Denmark.

Scientists from the University of Copenhagen report that adding 2.4 grams of flaxseed fiber to a meal increased both ratings of satiety and fullness, compared with a control meal.

"These results point toward a potential of purified flaxseed dietary fiber to moderate several risk factors through effects on lipid metabolism as well as appetite regulation, although no effect on ad libitum food intake was seen," wrote the researchers in Nutrition, Metabolism and Cardiovascular Diseases.

The Danish researchers recruited 18 young men with an average age of 27 and an average BMI of 25 k/m2 and randomly assigned them to consume meals supplemented with 1.4 or 2.4 grams of whole flaxseeds per megajoule of energy or 2.4 or 3.5 g/MJ of flaxseed dietary fiber. During seven hours of study, analysis of appetite-regulating hormones and blood sugar and lipid levels were analyzed.

Results showed that compared to a control meal, blood levels of triacylglycerols were reduced significantly after consuming the highest dose of flaxseed fiber.

"Higher mean ratings of satiety and fullness was [sic] seen following the [high dose fiber] meal compared to [the control] meal," the researchers wrote.

"Further research is however necessary to substantiate the observed effects and to determine whether a reduction in postprandial triacylglycerols and appetite will translate into a change in body weight and cardiovascular risk in the longer term" they added.

Nutrition, Metabolism and Cardiovascular Diseases; Published online ahead of print.

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