Fiber – plant carbohydrates that people cannot digest – not only feeds humans, it also feeds the trillions of beneficial microbes in the gut. Bacteria in the intestine break fiber into chemicals that nourish cells and reduce inflammation. Microbes eat specialized diets, according to a new U.S. study in mice. That means a fiber-rich diet can nourish a wide variety of gut microbes, while a low-fiber diet nourishes a smaller community. Researchers found that low-fiber diets deplete the complex microbial ecosystems and can cause a loss of diversity and internal deficiencies that can be passed on to future generations. It is not known whether those lost microbes can ever be replaced, or what impact the loss of the microbes may have had on human health.
"Diet-induced extinctions in the gut microbiota compound over generations", Nature, January 15, 2016
A higher fat version of an anti-hypertension diet not only lowered blood pressure tas much as the non-dairy version, but also reduced blood fats and did not significantly raise LDL cholesterol, a U.S. study has found. The DASH (dietary approaches to stop hypertension) diet was developed to lower blood pressure and includes low-fat and nonfat dairy foods, reduced sodium, fruits and vegetables, and whole grains. Researchers tested 36 adults who alternated eating a control diet, a normal DASH diet and a modified DASH diet with higher amounts of fat. The higher fat DASH diet lowered blood pressure to the same extent as the DASH diet without raising “bad” cholesterol levels, making it a an effective alternative to the widely recommended DASH diet.
"Comparison of the DASH (Dietary Approaches to Stop Hypertension) diet and a higher-fat DASH diet on blood pressure and lipids and lipoproteins: a randomized controlled trial. ", American Journal of Clinical Nutrition, January 24, 2016
A diet that contains regular helpings of foods rich in certain flavonoids reduces the risk of erectile dysfunction (ED) in men under age 70, a study by U.S. and British scientists has found. The most potent flavonoids are found in various fruits. Anthocyanins are found in blueberries, cherries, blackberries, radishes and blackcurrants; flavanones and flavones are found in citrus fruits. The study also showed that that eating more fruit generally was associated with a 14 percent reduction in the risk of ED. A flavonoid-rich diet is as good for erectile function as vigorously walking for up to five hours a week, the researchers noted.
"Dietary flavonoid intake and incidence of erectile dysfunction. ", American Journal of Clinical Nutrition, January 24, 2016
New U.S. research has found a correlation between frequent drinking of sugary beverages and harmful visceral fat in middle-aged adults. Visceral (or deep) fat surrounds the liver, pancreas and intestines, adversely affecting hormone function. It is thought to play a large role in insulin resistance that boosts type 2 diabetes and heart disease risk. For the study, 1,003 men and women (average age 45) who answered food questionnaires and underwent CT scans were monitored for six years. At the end, researchers found that regardless of age, gender, physical activity, body mass index and other factors, visceral fat volume increased by 658 cm³ for non-drinkers, 649 cm³ for occasional drinkers, 707 cm³ for frequent drinkers, and 852 cm³ for those who drank one beverage daily.
"Sugar-Sweetened Beverage Consumption is Associated With Change of Visceral Adipose Tissue Over 6 Years of Follow-Up. ", Circulation, January 24, 2016
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Endocrine Society, January 09, 2016
Nutrition Journal, January 19, 2016
NUTRAingredinents.com, January 28, 2016
The BMJ, January 28, 2016
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