Beans, peas, lentils can significantly reduce 'bad cholesterol' and risk of heart disease

Eating just 1 serving daily of legumes such as beans, chickpeas, lentils and peas can significantly reduce "bad cholesterol" and the risk of heart disease, found a study published in CMAJ (Canadian Medical Association Journal).

High cholesterol levels are associated with increased risk of cardiovascular disease, yet they are modifiable through diet and other . Most chronic disease prevention guidelines recommend consumption of non–oil-seed legumes (dietary pulses) such as beans, chickpeas, lentils and peas along with other vegetables and fruits as part of a , although they have not made specific recommendations based on direct lipid-lowering benefits.

The study, conducted by researchers from many centres in Canada and the United States, reviewed 26 randomized controlled trials that included 1037 people. Despite variation between studies, the researchers found a 5% reduction in low-density lipoprotein (LDL) cholesterol in people who ate 1 serving (3/4 cup) of non–oil-seed legumes a day. Men had greater reduction in LDL cholesterol than women, perhaps because their diets are poorer and cholesterol levels are higher and benefit more markedly from a healthier diet. Some study participants reported stomach upset such as bloating, flatulence, diarrhea or constipation.

"The reduction of 5% [LDL cholesterol] in our meta-analysis suggests a potential risk reduction of 5%-6% in major vascular events," writes Dr. John Sievenpiper of the Clinical Nutrition and Risk Factor Modification Centre, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, with coauthors.

They note that although consumption levels of legumes is low in Western countries such as Canada and the United States, 1 serving a day "is reasonable and is currently consumed by many cultures without reports of adverse effects that would limit consumption."

"Canadians have a lot of room in their diets to increase their pulse intake and derive cardiovascular benefits," states Dr. Sievenpiper. "Only 13% consume pulses on any given day, and of those who do, the average intake is only about a half serving."

The authors hope this study will add to the body of evidence upon which dietary guidelines are based. Most current evidence is of low quality, and the authors call for more high-quality research.

"Because dietary pulse intake may have beneficial effects on other cardiometabolic risk factors, including body weight, blood pressure and glucose control, future systematic reviews and meta-analyses should evaluate the effects of such dietary interventions on these outcomes and others, to address factors that contribute to residual risk," the authors conclude.

More information: www.cmaj.ca/lookup/doi/10.1503/cmaj.131727

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

Study reveals state of crisis in Canadian foster care system

15 hours ago

A new study of foster care in Canada led by a researcher at Western University reveals a shrinking number of foster care providers are available across the country to care for a growing number of children with increasingly ...

Researchers prove the benefits of persimmons for diet

17 hours ago

Alba Mir and Ana Domingo, researchers from the Department of Analytical Chemistry of the University of Valencia, under the supervision of professors Miguel de la Guardia and Maria Luisa Cervera, from the same department, ...

Hand blenders used for cooking can emit persistent chemicals

17 hours ago

Eight out of twelve tested models of hand blenders are leaking chlorinated paraffins when used according to the suppliers' instructions. This is revealed in a report from Stockholm University where researchers analyzed a ...

User comments