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08 April 2014

More beans and lentils may benefit your heart

Canadian researchers found that one daily serving of legumes – foods like beans, chickpeas, lentils and peas – was linked to a reduction in 'bad' cholesterol.

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Eating beans, lentils and other legumes may help you cut down on LDL "bad" cholesterol and lower your risk for heart disease, a new review suggests.

Canadian researchers examined 26 US and Canadian studies that included a total of more than 1000 people. Their analysis showed that one daily serving (3/4 cup) of legumes– foods such as beans, chickpeas, lentils and peas – was linked to a reduction in low-density lipoprotein (LDL) cholesterol by 5%. The study couldn't confirm cause-and-effect, but did show a strong association.

Read: Which foods have sulphur?

The 5% reduction in LDL cholesterol suggests a potential 5% lower risk of heart disease, according to a team led by Dr John Sievenpiper, of the Clinical Nutrition and Risk Factor Modification Centre at St. Michael's Hospital in Toronto.

Men benefited more

The heart-healthy effect of legumes was greater in men than women, the research found. That may be because men tend to have worse eating habits and higher cholesterol levels to begin with than women, so they might gain more from switching to a healthier diet.

Some of the study participants reported stomach problems such as bloating, flatulence, constipation or diarrhoea as a result of eating legumes.

Read: 10 foods that cause bloating

Nevertheless, nutrition experts were quick to sing the praises of the lowly bean, pea and lentil.

"It's time to spill the beans. By making a small dietary change, such as consuming one serving a day of beans, chickpeas, lentils and peas – as most of the world does already – we can make a modest risk reduction in our incidence of heart disease by lowering our 'bad cholesterol' LDL, especially in men," said Dr Robert Graham, an internist and natural remedy specialist at Lenox Hill Hospital in New York City.

He said the study analysis was "methodologically strong", with people being followed for at least three weeks to test the effect of legume intake on health. According to Graham, that three-week threshold is the same the US Food and Drug Administration uses when it evaluates any product that claims to help lower cholesterol.

Read: Protein facts for vegetarians

Under-appreciated protein


Angelo White is a sports dietitian and assistant clinical professor at Quinnipiac University in Hamden, Connecticut. He called legumes "one of the most under-appreciated sources of protein out there. They are loaded with hunger-fighting fibre and protein, so I am not surprised to see the results of this study."

But White added that, "the tricky part is getting Americans to eat more. I suggest foods like hummus, lentil soup in the slow cooker, and adding beans to pasta dishes, soups, salads and quesadillas to work more into the daily diet."

The study was published in CMAJ, the Canadian Medical Association Journal.


Read more:

Beans tied to lower diabetes

Cup of beans a day good for diabetics?
Soy may help to combat obesity


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